The independent trade union known in the west as Solidarity was formed on September 17, 1980. It was the successor of a number of previous protest and unionisation movements in Poland, and fittingly, one of its first major acheivements was the recognition of its predecessors with the creation of the Momument to the Fallen Shipyards Workers 1970, unveiled on December 16, 1980.
Across that winter, Solidarity continued various protest actions, notably meeting with a delegation from the Vatican on January 15 of 1981. As the organisation evolved, it became something greater than just a trade union: it became a fully-fledged movement for social, political and economic revolution. Increasingly, it was led by the charismatic Lech Walesa, who became an inspirational figure to progressives the world over.
Solidarity eventually achieved its goals with the overthrow of the Communist regime in Poland in 1989. Its subsequent transition to becoming a political party has been a rocky and rather less successful one.