The Union is a term used to refer to the federal government and loyal states of the United States during the American Civil War. Its military forces and civilian population resisted the secession of the Southern slave states that formed the Confederate States of America following the 1860 election of Abraham Lincoln as president of the United States. Lincoln's administration asserted the permanency of the federal government and the continuity of the United States Constitution, and it refused to recognize the Confederate government.
Many Americans in the 19th century commonly used the term "the Union" to mean either the federal government of the United States or the unity of the states within the federal constitutional framework. The Union can also refer to the people or territory of the states that remained loyal to the national government during the war. The loyal states located mostly north of the Mason–Dixon line were also known as the "North", although four southern border states and West Virginia, when it became a state during the war, remained loyal to the Union, and many Black Southerners (both free and enslaved) and Southern Unionists opposed secession and supported the Union war effort.
The Northeast and Midwest provided the industrial resources for a mechanized war, producing large quantities of munitions and supplies and financing the war. They also provided a vast majority of the Union Army soldiers, food, horses, financial support, and training camps. Army hospitals and prison camps were also set up across the Union. Most Northern states had Republican governors who supported the war effort and suppressed anti-war subversion. The Democratic Party supported the war at the beginning in 1861, but by 1862 it split into the War Democrats and the anti-war element known as Peace Democrats, led by the "Copperheads". The Democrats made major electoral gains in 1862 in state elections, most notably in New York. They lost ground in 1863, especially in Ohio. In 1864, the Republicans and War Democrats joined to campaign under the National Union Party banner, which also attracted most soldiers, and scored a landslide victory for Lincoln and his entire ticket against Democratic candidate George B. McClellan.

The war years were quite prosperous except where serious fighting and guerrilla warfare ravaged the countryside. Almost all military actions took place in the Confederacy. Prosperity was stimulated by heavy government spending and the creation of an entirely new national banking system. The Union states invested a great deal of money and effort in organizing psychological and social support for soldiers' wives, widows, and orphans, and for the soldiers themselves. Most soldiers were volunteers, although after 1862 many volunteered in order to escape the draft and to take advantage of generous cash bounties offered by states and localities. Draft resistance was notable in some larger cities, especially in parts of New York City, with its massive anti-draft riots of July 1862 and in some remote districts such as the Coal Region of Northeastern Pennsylvania.
Etymology
In the context of the American Civil War, the Union, or the United States, is sometimes referred to as "the North", both then and now, while the Confederacy was often called "the South".
The term "Union" occurs in the first governing document of the United States, the Articles of Confederation and Perpetual Union. The subsequent Constitution of 1787 was issued and ratified in the name not of the states, but of "We the People of the United States, in Order to form a more perfect Union ..." Union, for the United States of America, is then repeated in such clauses as the Admission to the Union clause in Article IV, Section 3. Even before the Civil War began the phrase "preserve the Union" was commonplace, and a "union of states" had been used to refer to the entire United States of America. Using the term "Union" to apply to the non-secessionist side carried a connotation of legitimacy as the continuation of the pre-existing political entity. Before the American Civil War, the United States was known as the "United States' federal union", a union of states controlled by the federal government in Washington, D.C. This was opposite to the CSA's first government, a confederation of independent states, functioning similarly to the European Union. Confederates generally saw the Union as being opposed to slavery, occasionally referring to them as abolitionists, in reference to the U.S. Navy as the "abolition fleet" and the U.S. Army as "abolition forces".

In 2015, historian Michael Landis called for an end to the use of the term "Union", writing, "The employment of 'Union' instead of 'United States,' implicitly supports the Confederate view of secession wherein the nation of the United States collapsed.... In reality, however, the United States never ceased to exist.... The dichotomy of 'Union v. Confederacy' lends credibility to the Confederate experiment and undermines the legitimacy of the United States as a political entity." In 2021, the Army University Press noted that it was replacing "Union" with "Federal Government" or "U.S. Government", because this was "more historically accurate", as "the term 'Union' always referred to all the states together."
Size and strength
Compared to the Confederacy, the loyal states were more industrialized and urbanized and possessed more advanced commercial, transportation, and financial systems. Additionally, the Union states had a manpower advantage of five to two at the start of the war.
Year by year, the Confederacy shrank and lost control of increasing quantities of resources and population. Meanwhile, the United States turned its growing advantage into a much stronger military force. However, much of the US strength had to be used to garrison former Confederate areas and to protect railroads and other vital points. The loyal states' great advantages in population and industry would prove to be vital long-term factors in its victory over the Confederacy, but it took time for the Union to fully mobilize these resources.

Public opinion
The attack on Fort Sumter rallied the free states to the defense of American nationalism. In 1959, Columbia University historian Allan Nevins wrote:
The thunderclap of Sumter produced a startling crystallization of Northern sentiment.... Anger swept the land. From every side came news of mass meetings, speeches, resolutions, tenders of business support, the muster of companies and regiments, the determined action of governors and legislatures. Russell McClintock states:
At the time, Northerners were right to wonder at the near unanimity that so quickly followed long months of bitterness and discord. It would not last throughout the protracted war to come—or even through the year—but in that moment of unity was laid bare the common Northern nationalism usually hidden by the fierce battles more typical of the political arena."

Historian Michael Smith argues that, as the war ground on year after year, the spirit of American republicanism grew stronger and generated fears of corruption in high places. Voters became afraid of power being centralized in Washington, extravagant spending, and war profiteering. Democratic candidates emphasized these fears. The candidates added that rapid modernization was putting too much political power in the hands of Eastern financiers and industrialists. They warned that the abolition of slavery would bring a flood of freed black people into the labor market of the free states.
Republicans responded with charges of defeatism. They indicted Copperheads for criminal conspiracies to free Confederate prisoners of war and played on the spirit of nationalism and the growing hatred of the slave owners, as the guilty party in the war.
President Lincoln
Historians have overwhelmingly praised the "political genius" of Abraham Lincoln's performance as president. His first priority was military victory. This required that he master entirely new skills as a strategist and diplomat. He oversaw supplies, finances, manpower, the selection of generals, and the course of overall strategy. Working closely with state and local politicians, he rallied public opinion and (at Gettysburg) articulated a national mission that has defined America ever since. Lincoln's charm and willingness to cooperate with political and personal enemies made Washington work much more smoothly than Richmond, the Confederate capital, and his wit smoothed many rough edges. Lincoln's cabinet proved much stronger and more efficient than Davis's, as Lincoln channeled personal rivalries into a competition for excellence rather than mutual destruction. With William Seward at State, Salmon P. Chase at the Treasury, and (from 1862) Edwin Stanton at the War Department, Lincoln had a powerful cabinet of determined men. Except for monitoring major appointments and decisions, Lincoln gave them free rein to end the Confederate rebellion.

Congress
The Republican Congress passed many major laws that reshaped the nation's economy, financial system, tax system, land system, and higher education system. These included the Morrill tariff, the Homestead Act, the Pacific Railroad Act, and the National Banking Act. Lincoln paid relatively little attention to this legislation as he focused on war issues, but he worked smoothly with congressional leaders such as Thaddeus Stevens (on taxation and spending), Charles Sumner (on foreign affairs), Lyman Trumbull (on legal issues), Justin Smith Morrill (on land grants and tariffs) and William Pitt Fessenden (on finances).
Military and reconstruction issues were another matter. Lincoln, as the leader of the moderate and conservative factions of the Republican Party, often crossed swords with the Radical Republicans, led by Stevens and Sumner. Historian Bruce Tap shows that Congress challenged Lincoln's role as commander-in-chief through the Joint Committee on the Conduct of the War. It was a joint committee of both houses that was dominated by the Radical Republicans, who took a hard line against the Confederacy. During the 37th and 38th Congresses, the committee investigated every aspect of Union military operations, giving special attention to finding commanders culpable for military defeats. It assumed an inevitable Union victory. Failure was perceived to indicate evil motivations or personal failures. The committee distrusted graduates of West Point, since many of the academy's alumni were leaders of the enemy army. Members of the committee much preferred political generals with a satisfactory political record. Some of the committee suggested that West-Pointers who engaged in strategic maneuver were cowardly or even disloyal. It ended up endorsing incompetent but politically acceptable generals.
Opposition
The opposition came from Copperhead Democrats, who were strongest in the Midwest and wanted to allow Confederate secession. In the East, opposition to the war was strongest among Irish Catholics, but also included business interests connected to the slave states typified by August Belmont. The Democratic Party was deeply split. In 1861 most Democrats supported the war. However, the party increasingly split down the middle between the moderates who supported the war effort, and the peace element, including Copperheads, who did not. It scored major gains in the 1862 elections, and elected the moderate Horatio Seymour as governor of New York. They gained 28 seats in the House of Representatives, including the Speaker of the House's seat but Republicans retained control of both the House and the Senate.

The 1862 election for the Indiana legislature was especially hard-fought. Though the Democrats gained control of the legislature, they were unable to impede the war effort. Republican Governor Oliver P. Morton was able to maintain control of the state's contribution to the war effort despite the Democratic majority. Washington was especially helpful in 1864 in arranging furloughs to allow Hoosier soldiers to return home so they could vote in elections. Across the North in 1864, the great majority of soldiers voted Republican or National Union. Men who had been Democrats before the war often abstained or voted Republican.
As the federal draft laws tightened, there was serious unrest among Copperhead strongholds, such as the Irish in the Pennsylvania coal mining districts. The government needed the coal more than the draftees, so it ignored the largely non-violent draft dodging there. The violent New York City draft riots of 1863 were suppressed by the U.S. Army firing grape shot down cobblestone city streets.
The Democrats nominated George McClellan, a War Democrat for the 1864 presidential but imposed an anti-war platform on him. In terms of Congress the opposition against the war was nearly powerless—as was the case in most states. In Indiana and Illinois pro-war governors circumvented anti-war legislatures elected in 1862. For 30 years after the war the Democrats carried the burden of having opposed the martyred Lincoln, who was viewed by many as the salvation of the Union and the destroyer of slavery.
Copperheads
The Copperheads were a large faction of Northern Democrats who opposed the war, demanding an immediate peace settlement. They said they wanted to restore "the Union as it was," that is with the South and with slavery. The most prominent Copperhead was Ohio's Clement L. Vallandigham, a congressman and leader of the Democratic Party in Ohio. He was defeated in an election for governor in 1863. Republican prosecutors in the Midwest accused some Copperhead activists of treason in a series of trials in 1864.
Copperheadism was a grassroots movement, strongest in the area just north of the Ohio River, as well as in some urban ethnic wards. Some historians have argued that it represented a traditionalistic element alarmed at the rapid modernization of society sponsored by the Republican Party. It looked back to Jacksonian Democracy for inspiration—with ideals that promoted an agrarian rather than an industrialized concept of society. Weber (2006) argues that the Copperheads damaged the Union war effort by fighting the draft, encouraging desertion and forming conspiracies. However, other historians say the Copperheads were a legitimate opposition force unfairly treated by the government, adding that the draft was in disrepute and that the Republicans greatly exaggerated the conspiracies for partisan reasons. Copperheadism was a major issue in the 1864 presidential election—its strength waxed when Union armies were doing poorly and waned when they won great victories. After the fall of Atlanta in September 1864, military success seemed assured and Copperheadism collapsed.
Soldiers
Recruiting volunteers
Enthusiastic young men clamored to join the Union army in 1861. They came with family support for reasons of patriotism and excitement. Washington decided to keep the small regular army intact; it had only 16,000 men and was needed to guard the frontier. Its officers could, however, join the temporary new volunteer army that was formed, with expectations that their experience would lead to rapid promotions. The problem with volunteering, however, was its serious lack of planning, leadership, and organization at the highest levels. Washington called on the states for troops, and every free state governor set about raising and equipping regiments, and sent the bills to the War Department. The men could elect the junior officers, while the governor appointed the senior officers, and Lincoln appointed the generals. Typically, politicians used their local organizations to raise troops and were in line (if healthy enough) to become colonel. The problem was that the War Department, under the disorganized leadership of Simon Cameron, also authorized local and private groups to raise regiments. The result was widespread confusion and delay.
Pennsylvania, for example, had acute problems. When Washington called for 10 more regiments, enough men volunteered to form 30. However, they were scattered among 70 different new units, none of them a complete regiment. Not until Washington approved gubernatorial control of all new units was the problem resolved. Allan Nevins is particularly scathing of this in his analysis: "A President more exact, systematic and vigilant than Lincoln, a Secretary more alert and clearheaded than Cameron, would have prevented these difficulties."
By the end of 1861, 700,000 soldiers were drilling in Union camps. The first wave in spring was called up for only 90 days, then the soldiers went home or reenlisted. Later waves enlisted for three years.
The new recruits spent their time drilling in company and regiment formations. The combat in the first year, though strategically important, involved relatively small forces and few casualties. Sickness was a much more serious cause of hospitalization or death.
In the first few months, men wore low quality uniforms made of "shoddy" material, but by fall, sturdy wool uniforms—in blue—were standard. The nation's factories were converted to produce the rifles, cannons, wagons, tents, telegraph sets, and the myriad of other special items the army needed.
While business had been slow or depressed in spring 1861, because of war fears and Confederate boycotts, by fall business was hiring again, offering young men jobs that were an alternative way to help win the war. Nonpartisanship was the rule in the first year, but by summer 1862, many Democrats had stopped supporting the war effort, and volunteering fell off sharply in their strongholds.
The calls for more and more soldiers continued, so states and localities responded by offering cash bonuses. By 1863, a draft law was in effect, but few men actually were drafted and served, since the law was designed to get them to volunteer or hire a substitute. Others hid away or left the country. With the Emancipation Proclamation taking effect in January 1863, localities could meet their draft quota by sponsoring regiments of ex-slaves organized in the Confederacy.
Michigan was especially eager to send thousands of volunteers. A study of the cities of Grand Rapids and Niles shows an overwhelming surge of nationalism in 1861, whipping up enthusiasm for the war in all segments of society, and all political, religious, ethnic, and occupational groups. However, by 1862 the casualties were mounting, and the war was increasingly focused on freeing the slaves in addition to preserving the Union. Copperhead Democrats called the war a failure, and it became an increasingly partisan Republican effort. Michigan voters remained evenly split between the parties in the presidential election of 1864.
Motivations of soldiers
Michael Perman (2010) says historians are of two minds on why millions of men seemed so eager to fight, suffer, and die over four years:
Some historians emphasize that Civil War soldiers were driven by political ideology, holding firm beliefs about the importance of liberty, Union, or state rights, or about the need to protect or to destroy slavery. Others point to less overtly political reasons to fight, such as the defense of one's home and family, or the honor and brotherhood to be preserved when fighting alongside other men. Most historians agree that, no matter what he thought about when he went into the war, the experience of combat affected him profoundly and sometimes affected his reasons for continuing to fight.
The paperwork war
On the whole, the national, state, and local governments handled the avalanche of paperwork effectively. Skills developed in insurance and financial companies formed the basis of systematic forms, copies, summaries, and filing systems used to make sense of masses of human data. The leader in this effort, John Shaw Billings, later developed a system of mechanically storing, sorting, and counting numerical information using punch cards. Nevertheless, old-fashioned methodology had to be recognized and overcome. An illustrative case study came in New Hampshire, where the critical post of state adjutant general was held in 1861–64 by elderly politician Anthony C. Colby (1792–1873) and his son Daniel E. Colby (1816–1891). They were patriotic, but were overwhelmed with the complexity of their duties. The state lost track of men who enlisted after 1861; it had no personnel records or information on volunteers, substitutes, or draftees, and there was no inventory of weaponry and supplies. Nathaniel Head (1828–1883) took over in 1864, obtained an adequate budget and office staff, and reconstructed the missing paperwork. As result, widows, orphans, and disabled veterans received the postwar payments they had earned.
Medical conditions
More soldiers died of disease than from battle injuries, and even larger numbers were temporarily incapacitated by wounds, disease, and accidents. The Union responded by building army hospitals in every state.
The hygiene of the camps was poor, especially at the beginning of the war when men who had seldom been far from home were brought together for training with thousands of strangers. First came epidemics of the childhood diseases of chicken pox, mumps, whooping cough, and especially, measles. Operations in the Confederacy meant a dangerous and new disease environment, bringing diarrhea, dysentery, typhoid fever, and malaria. There were no antibiotics, so the surgeons prescribed coffee, whiskey, and quinine. Harsh weather, bad water, inadequate shelter in winter quarters, poor policing of camps, and dirty camp hospitals took their toll. This was a common scenario in wars from time immemorial, and conditions faced by the Confederate army were even worse. What was different in the Union was the emergence of skilled, well-funded medical organizers who took proactive action, especially in the much enlarged United States Army Medical Department, and the United States Sanitary Commission, a new private agency. Numerous other new agencies also targeted the medical and morale needs of soldiers, including the United States Christian Commission, as well as smaller private agencies, such as the Women's Central Association of Relief for Sick and Wounded in the Army (WCAR), founded in 1861 by Henry Whitney Bellows, a Unitarian minister, and the social reformer Dorothea Dix. Systematic funding appeals raised public consciousness as well as millions of dollars. Many thousands of volunteers worked in the hospitals and rest homes, most famously poet Walt Whitman. Frederick Law Olmsted, a famous landscape architect, was the highly efficient executive director of the Sanitary Commission.
States could use their own tax money to support their troops, as Ohio did. Under the energetic leadership of Governor David Tod, a War Democrat who won office on a coalition "Union Party" ticket with Republicans, Ohio acted vigorously. Following the unexpected carnage at the battle of Shiloh in April 1862, Ohio sent three steamboats to the scene as floating hospitals equipped with doctors, nurses, and medical supplies. The state fleet expanded to 11 hospital ships, and the state set up 12 local offices in main transportation nodes, to help Ohio soldiers moving back and forth.
The Christian Commission comprised 6,000 volunteers who aided chaplains in many ways. For example, its agents distributed Bibles, delivered sermons, helped with sending letters home, taught men to read and write, and set up camp libraries.
The Army learned many lessons and modernized its procedures, and medical science—especially surgery—made many advances. In the long run, the wartime experiences of the numerous Union commissions modernized public welfare, and set the stage for large—scale community philanthropy in America based on fund raising campaigns and private donations.
Additionally, women gained new public roles. For example, Mary Livermore (1820–1905), the manager of the Chicago branch of the US Sanitary Commission, used her newfound organizational skills to mobilize support for women's suffrage after the war. She argued that women needed more education and job opportunities to help them fulfill their role of serving others.
The Sanitary Commission collected enormous amounts of statistical data, and opened up the problems of storing information for fast access and mechanically searching for data patterns. The pioneer was John Shaw Billings (1838–1913). A senior surgeon in the war, Billings built two of the world's most important libraries, Library of the Surgeon General's Office (now the National Library of Medicine) and the New York Public Library; he also figured out how to mechanically analyze data by turning it into numbers and punching onto the computer punch card, later developed by his student Herman Hollerith. Hollerith's company became International Business Machines (IBM) in 1911.
Prisoners of war
Both sides operated prison camps; they handled about 400,000 captives, but many other prisoners were quickly released and never sent to camps. The Record and Pension Office in 1901 counted 211,000 United States soldiers who were captured. In 1861–63 most were immediately paroled; after the parole exchange system broke down in 1863, about 195,000 went to Confederate prison camps. Some tried to escape but few succeeded. By contrast 464,000 Confederates were captured (many in the final days) and 215,000 imprisoned. Over 30,000 Union and nearly 26,000 Confederate prisoners died in captivity. Just over 12% of the captives in United States prisons died, compared to 15.5% for Confederate prisons.
Draft riots
Discontent with the 1863 draft law led to riots in several cities and in rural areas as well. By far the most important were the New York City draft riots of July 13 to July 16, 1863. Irish Catholic and other workers fought police, militia and regular army units until the Army used artillery to sweep the streets. Initially focused on the draft, the protests quickly expanded into violent attacks on blacks in New York City, with many killed on the streets.
Small-scale riots broke out in ethnic German and Irish districts, and in areas along the Ohio River with many Copperheads. Holmes County, Ohio was an isolated parochial area dominated by Pennsylvania Dutch and some recent German immigrants. It was a Democratic stronghold and few men dared speak out in favor of conscription. Local politicians denounced Lincoln and Congress as despotic, seeing the draft law as a violation of their local autonomy. In June 1863, small-scale disturbances broke out; they ended when the Army sent in armed units.
Economy
The Union economy grew and prospered during the war while fielding a very large army and navy. The Republicans in Washington had a Whiggish vision of an industrial nation, with great cities, efficient factories, productive farms, all national banks, all knit together by a modern railroad system, to be mobilized by the United States Military Railroad. The slave states had resisted policies such as tariffs to promote industry and homestead laws to promote farming because slavery would not benefit. With the slave state representatives absent and Northern Democrats weak, the Republicans enacted their legislation. At the same time they passed new taxes to pay for part of the war and issued large amounts of bonds to pay for most of the rest. Economic historians attribute the remainder of the cost of the war to inflation. Congress wrote an elaborate program of economic modernization that had the dual purpose of winning the war and permanently transforming the economy.