War map of Minneapolis drawn during the Twin Cities Streetcar strike, 1917. The map was likely drawn by Minnesota Home Guard and Minneapolis police commanders. Original map is in the Edward Karow Scrapbooks, 1917–1925, Manuscript Collection, Minnesota Historical Society, St. Paul.
When the Twin City Rapid Transit Company (TCRTC) refused to recognize the newly formed streetcar men's union, employees took to the streets of St. Paul and Minneapolis in the fall of 1917 to fight for their civil liberties. The labor dispute challenged state jurisdiction and reached the White House before finding settlement the following year.