July 20, 1934 – Police in Minneapolis fire upon striking truck drivers,
during the Minneapolis Teamsters Strike of 1934, killing two and wounding sixty-seven.
The Minneapolis General Strike of 1934 grew out of a strike by Teamsters against most of the trucking companies operating in Minneapolis, a major distribution center for the Upper Midwest. The strike began on May 16, 1934 in the Market District (the modern day Warehouse District) and ensuing violence lasted periodically throughout the summer. Led by local leaders associated with the Trotskyist Communist League of America, a group that later founded the Socialist Workers Party (United States), the strike paved the way for the organization of over-the-road drivers and the growth of the Teamsters labor union. It, along with the 1934 West Coast Longshore Strike and the 1934 Toledo Auto-Lite Strike led by the American Workers Party, were also important catalysts for the rise of industrial unionism in the 1930s, much of which was organized through the Congress of Industrial Organizations.
http://en.wikipedia.org/wiki/Minneapolis_Teamsters_Strike_of_1934
