Lithuanian immigrants in Pittsburgh joined communist and socialist groups and sparred over national politics. Today, only a few signs of the era remain.

YouTube video by British Pathé

Pittsburgh's Frick lived through the German revolutions of 1848, joined Marx's First International and was present for the birth of American anarchism.

In the first decades of the 20th century, Finnish immigrants around Pittsburgh built an active, militant socialist movement before splits, red scares and departures left them weakened.