Solidarity, full name Independent Self-Governing Trade Union "Solidarity", is a Polish trade union founded in August 1980 at the Lenin Shipyard in Gdańsk, Poland. Subsequently, it was the first independent trade union in a Warsaw Pact country to be recognised by the state.
The union's membership peaked at 10 million in September 1981, representing one-third of the country's working-age population. In 1983 Solidarity's leader Lech Wałęsa was awarded the Nobel Peace Prize, and the union is widely recognized as having played a central role in the end of communist rule in Poland.