In 1941, the workers at Disney Studios went out on strike — and PM, New York's lefty newspaper, covered it in detail. Kip W, a Flickr user, has uploaded a fantastic set of scanned-in articles and pictures from FM's coverage. The strikers had an amazing grasp of theater, walking the picket-line carrying signs that parodied Disney characters, wearing Seven Dwarfs masks, etc.
Link, Link to Wikipedia entry on 1941 Disney strike
(Thanks, Amid!)