The Battle of Tsushima was the final naval battle of the Russo-Japanese War, fought on 27–28 May 1905 in the Tsushima Strait. A devastating defeat for the Imperial Russian Navy, the battle was the only decisive engagement ever fought between modern steel battleship fleets and the first in which wireless telegraphy (radio) played a critically important role. The battle was described by contemporary Sir George Clarke as "by far the greatest and the most important naval event since Trafalgar". The battle is known in Japan as the Naval Battle of the Sea of Japan.
The battle involved the Japanese Combined Fleet under Admiral Tōgō Heihachirō and the Russian Second Pacific Squadron under Admiral Zinovy Rozhestvensky, which had sailed over seven months and 18,000 nautical miles (33,000 km) from the Baltic Sea. The Russians hoped to reach Vladivostok and establish naval control of the Far East to relieve the Imperial Russian Army in Manchuria. The Russian fleet had a large advantage in the number of battleships, but was overall older and slower than the Japanese fleet, and was outnumbered nearly three to one in total hulls. The Russians were sighted in the early morning on 27 May, and the battle began in the afternoon. Rozhestvensky was wounded and knocked unconscious in the initial action, and four of his battleships were sunk by sunset. At night, Japanese destroyers and torpedo boats attacked the remaining ships, and Admiral Nikolai Nebogatov surrendered in the morning of 28 May.
All 11 Russian battleships were lost, of which seven were sunk and four captured. Only a few warships escaped, with one cruiser and two destroyers reaching Vladivostok, and two auxiliary cruisers as well as one transport escaping back to Madagascar. Three cruisers were interned at Manila by the United States until the war was over. Eight auxiliaries and one destroyer were disarmed and remanded at Shanghai by China. Russian casualties were high, with more than 5,000 dead and 6,000 captured. The Japanese, who had lost no heavy ships, had 117 dead.
The loss of almost every heavy warship of the Baltic Fleet forced Russia to sue for peace, and the Treaty of Portsmouth was signed in September 1905. 340 years after the first battle against the Europeans in Battle of Fukuda Bay in 1565, the battle was hailed in Japan as one of the greatest naval victories in Japanese history, comparable to repelling the invading Kōryō (Mongol) fleets in 1274 (770 ships) and 1281 (900 ships).
Admiral Tōgō was revered as a national hero. His flagship Mikasa has been preserved as a museum ship in Yokosuka Harbour.
Background
Conflict in the Far East
On 8 February 1904, destroyers of the Imperial Japanese Navy launched a surprise attack on the Russian Far East Fleet anchored in Port Arthur; three ships – two battleships and a cruiser – were damaged in the attack. The Russo-Japanese War had thus begun. Japan's first objective was to secure its lines of communication and supply to the Asian mainland, enabling it to conduct a ground war in Manchuria. To achieve this, it was necessary to neutralise Russian naval power in the Far East. At first, the Russian naval forces remained inactive and did not engage the Japanese, who staged unopposed landings in Korea. The Russians were revitalised by the arrival of Admiral Stepan Makarov and were able to achieve some degree of success against the Japanese, but on 13 April Makarov's flagship, the battleship Petropavlovsk, struck a mine and sank; Makarov was among the dead. His successors failed to challenge the Japanese Navy, and the remaining six Russian battleships and five armoured cruisers were effectively bottled up in their base at Port Arthur.

By May, the Japanese had landed forces on the Liaodong Peninsula and in August began the siege of the naval station. On 9 August, Admiral Wilgelm Vitgeft, commander of the 1st Pacific Squadron, was ordered to sortie his fleet to Vladivostok, link up with the Squadron stationed there, and then engage the Imperial Japanese Navy (IJN) in a decisive battle. Both squadrons of the Russian Pacific Fleet would ultimately become dispersed during the Battle of the Yellow Sea, where Admiral Vitgeft was killed by a salvo strike from the Japanese battleship Asahi on 10 August, and the Battle off Ulsan on 14 August 1904. What remained of Russian Pacific naval power would eventually be sunk in Port Arthur in December 1904.
Departure
With the inactivity of the First Pacific Squadron after the death of Admiral Makarov and the tightening of the Japanese noose around Port Arthur, the Russians considered sending part of their Baltic Fleet to the Far East. The plan was to relieve Port Arthur by sea, link up with the First Pacific Squadron, overwhelm the Imperial Japanese Navy, and then delay the Japanese advance into Manchuria until Russian reinforcements could arrive via the Trans-Siberian railroad and overwhelm the Japanese land forces there. As the situation in the Far East deteriorated, the Tsar (encouraged by his cousin Kaiser Wilhelm II), agreed to the formation of the Second Pacific Squadron. This would consist of five divisions of the Baltic Fleet, including 11 of its 13 battleships. The squadrons, including the later-formed Third Pacific Squadron, departed the Baltic ports of Reval (Tallinn) and Libau (Liepāja) on 15–16 October 1904 (Rozhestvensky fleet) and 2 February 1905 (Nebogatov fleet), and on 3 November 1904 (protected cruisers Oleg and Izumrud, auxiliary cruisers Ural and Terek, destroyers Gromkiy and Grozniy under the command of Captain 1st rank Leonid Dobrotvorsky.), numbering 48 ships and auxiliaries.
Dogger Bank
The Rozhestvensky and von Fölkersahm squadrons sailed through the Øresund Strait into the North Sea. The Russians had received numerous fictitious reports of Japanese torpedo boats operating in the area and were on high alert. In the Dogger Bank incident, the Rozhestvensky squadron mistook a group of British fishing trawlers operating near the Dogger Bank at night for hostile Japanese ships. The fleet fired upon the small civilian vessels, killing several British fishermen; one trawler was sunk, while another six were damaged. In confusion, the Russians even fired upon two of their own vessels, killing some of their own men. The firing continued for twenty minutes before Rozhestvensky ordered it to cease; loss of life was limited by the fact that the Russian gunnery was highly inaccurate. The British were outraged by the incident and incredulous that the Russians could mistake a group of fishing trawlers for Japanese warships, thousands of kilometres from the nearest Japanese port. Britain almost entered the war in support of Japan, with whom it had an alliance (but was neutral in the war, as their mutual defense clause stipulated "when either nation faced 'more than one' adversaries in a war"). The Royal Navy sortied and shadowed the Russian fleet until a diplomatic agreement was reached. France, which had hoped to eventually bring the British and Russians together in an anti-German bloc, intervened diplomatically to restrain Britain from declaring war. The Russians were forced to disembark officers who were suspected of misconduct to give evidence to the International Court of Inquiry at Paris, ultimately accepting responsibility for the incident and compensating the fishermen.

Routes
The draught of the newer battleships, which had proven to be considerably greater than designed, prevented their passage through the Suez Canal, causing the fleet to separate after leaving Tangier on 3 November 1904. The newer battleships, cruisers, fast auxiliaries, and destroyers for protection proceeded around the Cape of Good Hope under the command of Admiral Rozhestvensky, while the older battleships and cruisers made their way through the Suez Canal under the command of Admiral von Fölkersahm. They planned to rendezvous in Madagascar, and both sections of the fleet completed this part of the voyage. The longer journey around Africa took a toll on the Russian crews under Rozhestvensky, "who had never experienced such a different climate or such a long time at sea" as "conditions on the ships deteriorated, and disease and respiratory issues killed a number of sailors". The voyage took half a year in rough seas, with difficulty obtaining coal for refueling – as the warships could not legally enter the ports of neutral nations – and the morale of the crews plummeted. The Russians needed 500,000 short tons (450,000 t) of coal and 30 to 40 re-coaling sessions to reach French Indochina (now Vietnam), and coal was provided by 60 colliers from the Hamburg-Amerika Line. By April and May 1905 the reunited fleet had anchored at Cam Ranh Bay in French Indochina.
The Russians had been ordered to break the blockade of Port Arthur, but the Japanese land artillery sank the battleships in the port. The heavily fortified city/port had already fallen on 2 January, just after the Second Pacific Squadron arrived at Nossi Be, Madagascar, before the arrival of the Fölkersahm detachment. The objective was therefore shifted to linking up with the remaining Russian ships stationed in the port of Vladivostok, before bringing the Japanese fleet to battle.
Prelude
The Russians had three possible routes to enter the Sea of Japan and reach Vladivostok: the longer were the La Pérouse Strait and Tsugaru Strait, on either side of Hokkaido. Admiral Rozhestvensky did not reveal his choice even to his subordinates until 25 May, when it became apparent he chose Tsushima by ordering the fleet to head northeast after detaching transports Yaroslavl, Vladimir, Kuronia, Voronezh, Livonia and Meteor as well as auxiliary cruisers Rion and Dniepr with the instruction to go to the near-by neutral port of Shanghai. The Tsushima Strait is the body of water eastward of the Tsushima Island, located midway between the Japanese island of Kyushu and the Korean Peninsula, the shortest and most direct route from Indochina. The other routes would have required the fleet to sail east around Japan. The Japanese Combined Fleet and the Russian Second and Third Pacific Squadrons, sent from the Baltic Sea now numbering 38, would fight in the strait between Korea and Japan on the East side of Tsushima Island.

Because of the 18,000-mile (29,000 km) journey, the Russian fleet was in a poor condition for battle. Apart from the four newest Borodino-class battleships, Admiral Nebogatov's 3rd Pacific Fleet consisted of older and poorly maintained warships. Overall, the Japanese side had a manoeuvrability advantage. The long voyage, combined with a lack of opportunity for maintenance, meant the Russian ships were heavily fouled, significantly reducing their speed. The Japanese 1st Battle Division could exceed 18 knots (33 km/h) and regularly manoeuvred at 15 knots, but the Russian fleet included warships with the maximum speed of 14 to 15 knots (with new engines/boilers, normal load, and clean hull) and the auxiliaries of 10–12 knots, that limited the fleet speed to 9 knots.
Tōgō's greatest advantage was that of experience, having five of the ten fleet commanders in the history of the Russian and Japanese navy with combat experience aboard modern warships on his side, while Rozhestvensky had none. The other five were all Russian admirals whom Tōgō had defeated and not present for this battle, including Oskar Starck, who had been relieved of his command following his humiliating defeat in the Battle of Port Arthur; Admiral Stepan Makarov, killed by a mine off Port Arthur; Wilgelm Vitgeft, who had been killed in the Battle of the Yellow Sea; and Admiral (Prince) Pavel Ukhtomsky who was relieved and recalled to Mukden by Viceroy Yevgeni Alekseyev after six battleships of the Pacific Squadron failed to reach Vladivostok as a result of the Battle of the Yellow Sea. Admiral Karl Jessen, who experienced the Battle off Ulsan, remained in Vladivostok.
Additionally, there were significant deficiencies in the Russian naval fleet's equipment and training. Russian naval tests with their torpedoes exposed major technological failings.

Battle
First contact
Because the Russians wanted to slip undetected into Vladivostok, they approached Japanese waters in radio silence. They steered outside regular shipping channels to reduce the chance of detection. On the night of 26 May 1905, the Russian fleet approached the Tsushima Strait.
In the night, thick fog blanketed the straits, giving the Russians an advantage. At 02:45 on 27 May Japan Standard Time (JST), the Japanese auxiliary cruiser Shinano Maru observed three lights on what appeared to be a vessel on the distant horizon and closed to investigate. These lights were from the Russian hospital ship Orel, which, in compliance with the rules of war, had continued to burn them. At 04:30, Shinano Maru approached the vessel, noting that she carried no guns and appeared to be an auxiliary. The Orel mistook the Shinano Maru for another Russian vessel and did not attempt to notify the fleet. Instead, she signaled to Shinano Maru in Russian code, which made no sense to the Japanese ship. The Shinano Maru then sighted the shapes of ten other Russian ships in the mist.
Wireless telegraphy played an important role from the start. At 04:55, Captain Narikawa of the Shinano Maru sent a message to the Combined Fleet command onboard Mikasa in Masampo that the "Enemy is in grid 203". By 05:00, intercepted radio signals informed the Russians that they had been discovered and that Japanese scouting cruisers were shadowing them. Admiral Tōgō received the message at 05:05 and immediately began to prepare his battle fleet for a sortie.
Beginning of the battle
At 06:34, before departing with the Combined Fleet, Admiral Tōgō wired a message to the navy minister in Tokyo:
In response to the report that enemy ships have been sighted, the Combined Fleet will immediately commence action and attempt to attack and destroy them. Weather today fine but high waves.
The final sentence of this telegram has become famous in Japanese military history, and has been quoted by former Japanese Prime Minister Shinzō Abe.
The entire Japanese fleet was put to sea, with Tōgō in his flagship Mikasa leading over 40 vessels to meet the Russians. Meanwhile, the shadowing Japanese scouting vessels sent wireless reports every few minutes as to the formation and course of the Russian fleet. There was mist, which reduced visibility, and the weather was poor. Wireless gave the Japanese an advantage; in his report on the battle, Admiral Tōgō noted the following:
Though a heavy fog covered the sea, making it impossible to observe anything at a distance of over five miles, [through wireless messaging] all the conditions of the enemy were as clear to us, who were 30 or 40 miles distant, as though they had been under our very eyes.
At 13:40, both fleets sighted each other, ready to engage. At around 13:55, Tōgō ordered the hoisting of the Z flag, issuing a predetermined announcement to the entire fleet:
The Empire's fate depends on the result of this battle, let every man do his utmost duty.
Daylight action
The Russians sailed from south-southwest to north-northeast; "continuing to a point of intersection which allowed only their bow guns to bear; enabling him [Tōgō] to throw most of the Russian batteries successively out of bearing." The Japanese fleet steamed from northeast to southwest, then Tōgō ordered the fleet to turn 180-degrees in sequence, which enabled his ships to take the same course as the Russians. Rozhestvensky had only two alternatives, "a charge direct, in line abreast", or to commence "a formal pitched battle." He chose the latter, and at 14:08, the Japanese flagship Mikasa was hit at about 7,000 metres, with the Japanese replying at 6,400 meters. Although Tōgō's U-turn was successful, Russian gunnery had proven surprisingly good, and the flagship Mikasa was hit 15 times in five minutes. Before the end of the engagement, she was struck 15 more times by large-calibre shells. The Japanese fleet then steamed at 15 knots; the Russian at 11 in parallel engagement. Superior Japanese gunnery took its toll, with most of the Russian battleships being crippled in thirty minutes.
Captain 2nd Rank Vladimir Semenoff, a Russian staff officer aboard the flagship Knyaz Suvorov, said, "It seemed impossible even to count the number of projectiles striking us. Shells seemed to be pouring upon us incessantly one after another. The steel plates and superstructure on the upper decks were torn to pieces, and the splinters caused many casualties. Iron ladders were crumpled up into rings, guns were literally hurled from their mountings. In addition to this, there was the unusually high temperature and liquid flame of the explosion, which seemed to spread over everything. I actually watched a steel plate catch fire from a burst."
Ninety minutes into the battle, the first warship to be sunk was the Russian battleship Oslyabya from Rozhestvensky's 2nd Battleship division. This was the first time a modern armoured warship had been sunk by gunfire alone.
By 14:45, Tōgō had "crossed the Russian T", enabling him to fire broadsides, while the Russians could reply only with their forward turrets.
A direct hit on the Russian battleship Borodino's magazines by the Japanese battleship Fuji caused her to explode, which sent smoke thousands of metres into the air and trapped all but one of her crew onboard as she sank. Rozhestvensky was knocked out of action by a shell fragment that struck his skull. In the evening, Rear Admiral Nikolai Nebogatov took over command of the Russian fleet. The Russians lost the battleships Knyaz Suvorov, Oslyabya, Imperator Aleksandr III and Borodino. The Japanese ships suffered only light damage.
Night attacks
At night, around 20:00, 21 destroyers and 45 Japanese torpedo boats were thrown against the Russians. They were deployed initially from the north, east, and west while being slightly visible, forcing the Russians, roughly in the order of cruisers, battleships, and auxiliary groups, to turn west. The Japanese were aggressive, continuing their attacks for three hours without a break; as a result, during the night, there were several collisions between the small craft and Russian warships. The Russians were dispersed in small groups. By 23:00, it appeared that the Russians had vanished, but they revealed their positions to their pursuers by switching on their searchlights – ironically, the searchlights had been turned on to spot the attackers. The old battleship Navarin struck chained floating mines laid in front of her and was forced to stop to avoid pushing the chain forward, inviting other floating mines on the chain to hit her. She was consequently torpedoed four times and sunk. Out of a crew of 622, only three survived, one to be rescued by the Japanese and the other two by a British merchant ship.
The battleship Sissoi Veliky was badly damaged by a torpedo in the stern and was scuttled the next day. Two old armoured cruisers – Admiral Nakhimov and Vladimir Monomakh – were badly damaged, the former by a torpedo hit to the bow, the latter by colliding with a Japanese destroyer. They were both scuttled by their crews the next morning off Tsushima Island, where they headed while taking on water. The night attacks placed a great strain on the Russians, as they lost two battleships and two armoured cruisers, while the Japanese lost only three torpedo boats.
XGE signal and Russian surrender
At 05:23 on 28 May, what remained of the Russian fleet was sighted heading northeast. Tōgō's battleships proceeded to surround Nebogatov's remaining squadron south of the island of Takeshima and commenced main battery fire at 12,000 meters. The Russian cruiser Izumrud then turned southeast and started to flee. Realising that his guns were outranged by at least one thousand metres, and the Japanese battleships had proven on the day before to be faster than his own so that he could not close the distance if he tried, Nebogatov ordered the four battleships remaining under his command to surrender. XGE, an international signal of surrender, was hoisted; however, the Japanese navy continued to fire as they did not have "surrender" in their code books and had to find one that did hastily. Still under heavy fire, Nebogatov then ordered a white tablecloth sent up the masthead, but Tōgō, having faced the difficult decision to sink a British transport ship full of Chinese soldiers during the First Sino-Japanese War as the commander of IJN cruiser Naniwa, knew the signal meant a request for a truce or parley, not 'surrender' in the legal definition, and that either meaning contradicted not stopping the ships.
His lieutenants found the codebook, which included the XGE signal, and reported that engine shutdown was required for the signal. Since all the Russian ships were still moving, he continued firing while the response flag signal "STOP" was hoisted. Nebogatov then ordered St. Andrew's Cross lowered and the Japanese national flag raised on the gaff and all engines stopped. Seeing the requirement for the signal met, Tōgō gave the cease-fire and accepted Nebogatov's surrender. Nebogatov surrendered, knowing that he could be shot for doing so. He said to his men:
You are young, and it is you who will one day retrieve the honour and glory of the Russian Navy. The lives of the two thousand four hundred men in these ships are more important than mine.
As an example of the level of damage inflicted on a Russian battleship, Oryol was hit by five 12-inch, nine 8-inch, 39 six-inch, and 21 smaller or unidentified shells. This damage caused her to list, and the engine ceased to operate when she was being taken by the Japanese navy to the First Battle Division home port of Sasebo in Nagasaki after Tōgō accepted the surrender. Cruiser Asama and then battleship Asahi had to tow Oryol, and their destination was changed to the closer Maizuru Naval Arsenal to avoid losing the prize of war. Her commander, Captain Yung, who was seriously injured on 27 May, died in the night of the 29th onboard battleship Asahi en route.
Capture of Rozhestvensky
Russian destroyer Buyniy, after rescuing the squadron command including Admiral Rozhestvensky from the burning Knyaz Suvorov at 17:30 during the day battle on the 27th, found cruiser Donskoi, destroyers Byedoviy and Grozniy in convoy on the morning of 28 May. Rozhestvensky chose Byedoviy to move the fleet command officers and himself, as Buyniy had sustained serious damage, and Donskoi, being an old ship, was very slow. (Later in the afternoon, Buyniy was sunk by gunfire from Donskoi after taking the crew aboard.) Leaving the struggling Buyniy and the slow Donskoi behind, Byedoviy and Grozniy headed for Vladivostok.
Japanese destroyers Sazanami and Kagerō had mechanical issues during the night battle on the 27th and had to fix the problems at the Port of Ulsan. Both destroyers finished their temporary repair work by the morning of the 28th and left the port together. They spotted the two Russian destroyers on the way to join the rest of the Combined Fleet and engaged at 15:25.
Destroyer Grozniy increased speed being chased by Kagerō, but Byedoviy slowed down and stopped in the face of firing and approaching Sazanami while raising a white flag. Grozniy was able to keep sufficient distance from Kagerō, exchanging just a few long-distance shots at about 18:30, before nightfall. She became one of the three warships reaching Vladivostok after surviving the battle.
The Combined Fleet command could not believe the news when cruiser Akashi, which rendezvoused Sazanami on the morning of the next day, sent a radio telegraph message about the capture of Admiral Rozhestvensky, as they were certain to have sunk Knyaz Suvorov and assumed the squadron commander went down with the flagship. But cruiser Akashi, accompanied by Sazanami and Kagerō, arrived at Sasebo port in the morning of 30 May with Byedoviy in tow, with not only the injured admiral but also the surviving members of the Russian fleet command onboard.
Conclusion
Until the evening of 28 May, the Japanese pursued isolated Russian ships until almost all were destroyed or captured. The cruiser Izumrud, which escaped from the Japanese despite being present at Nebogatov's surrender, was destroyed by her crew after running aground on the Siberian coast.
The wounded Admiral Rozhestvensky went to the Imperial Japanese Naval Hospital in Sasebo to recover from a head injury caused by shrapnel; there, the victorious Admiral Tōgō visited him personally in plain clothes, comforting him with kind words: "Defeat is a common fate of a soldier. There is nothing to be ashamed of in it. The great point is whether we have performed our duty." Rozhestvensky was allowed to send a telegram to the Tsar at Tsarskoye Selo.
On 10 June 1905, Tsar Nicholas II responded with a telegram:
"Tokyo. Adjutant General Rozhdestvensky. From the bottom of my heart I thank you and all the ranks of the squadron who honestly fulfilled their duty in battle, for their selfless service to Russia. Your feat was destined to be crowned with success, but your fatherland will always be proud of your selfless courage. I wish you a speedy recovery, and may God console you all. Nikolai"
Rozhestvensky and other officers were placed on trial in August 1905 after returning to Russia. Rozhestvensky claimed full responsibility for the fiasco and was sentenced to death, but the Tsar commuted his death sentence. Flag captains Clapier de Colongue (Second Pacific Squadron) and Cross (Third Pacific Squadron), Staff officers Filippinovsky and Leontieff, together with the commanders of the surrendered battleships, Captains Vladimir Smirnov (Nikolai I), Nikolai Lishin (Apraksin), Sergei Grogoryev (Senyavin), and the Byedoviy commander Nikolai Baranov were sentenced to 10 years in prison and dismissed from service (Nicholas II pardoned them on 1 May 1909). The executive officer of Oryol (who was in charge of the ship at the surrender), Captain 2nd rank K.L. Schwede, and other officers were acquitted.
Admiral Nebogatov, who surrendered the fleet, was also sentenced to death, which was commuted to 10 years imprisonment and eventually pardoned by the Tsar. He was released from the Trubetskoy Bastion prison in Peter and Paul Fortress in May 1909.