Solidarity (Polish: Solidarność) was a Polish trade union and mass social movement founded in August 1980 at the Lenin Shipyard in Gdańsk, led by electrician Lech Wałęsa. At its peak it had 10 million members — nearly one-third of Poland's entire population — making it the largest independent civil society organisation in the Soviet bloc. By 1989, it had negotiated the first free elections in communist Eastern Europe, triggering a chain reaction that brought down the Iron Curtain.

How Did Solidarity Begin? The 1980 Gdańsk Strikes

The immediate spark was the dismissal of crane operator Anna Walentynowicz, a veteran activist, from the Lenin Shipyard on 7 August 1980, just five months before her retirement. Workers downed tools on 14 August. Lech Wałęsa, himself recently sacked, climbed the shipyard fence to join them and quickly became the strike's public face. The strikers issued 21 demands — including the right to form free trade unions, the right to strike, and the release of political prisoners. On 31 August 1980, Deputy Prime Minister Mieczysław Jagielski signed the Gdańsk Agreement, granting those core rights. Solidarity was formally registered on 17 September 1980. Within months, membership exploded to 10 million.

Martial Law and Repression: What Happened in 1981?

Alarmed by Solidarity's power and under pressure from Moscow, General Wojciech Jaruzelski declared martial law on 13 December 1981. Wałęsa and thousands of other activists were interned. Solidarity was formally banned in October 1982. Yet the movement survived underground, sustained by the Catholic Church, clandestine printing networks, and support from Western trade unions and the CIA, which channelled millions of dollars in equipment and funds. Pope John Paul II — himself Polish — lent enormous moral authority, his 1979 and 1983 pilgrimages to Poland drawing millions and emboldening resistance. By the mid-1980s, with Poland's economy deteriorating under a $40 billion foreign debt, the communist government faced an unwinnable standoff.

The Round Table Talks and the Fall of Communism (1989)

In April 1989, after months of Round Table negotiations between the government and Solidarity, a historic agreement re-legalised the union and scheduled semi-free elections for June 1989. Solidarity won 99 of 100 Senate seats and every contested Sejm seat. On 24 August 1989, Tadeusz Mazowiecki became the first non-communist prime minister in the Soviet bloc since the late 1940s. The effect was immediate and continental: Hungary opened its border, the Berlin Wall fell in November, and communist regimes across Eastern Europe collapsed within months. Lech Wałęsa won the Nobel Peace Prize in 1983 and became Poland's president in 1990. Solidarity's victory is widely regarded as the decisive first domino of the Cold War's end.

Key DateEvent
14 Aug 1980Lenin Shipyard strike begins in Gdańsk
31 Aug 1980Gdańsk Agreement signed; Solidarity born
17 Sep 1980Solidarity formally registered; 10 million members by year's end
13 Dec 1981General Jaruzelski declares martial law; Wałęsa interned
Oct 1982Solidarity banned by communist authorities
Apr 1989Round Table Agreement re-legalises Solidarity
4 Jun 1989Solidarity wins landslide in semi-free elections
24 Aug 1989Mazowiecki becomes first non-communist PM in Soviet bloc