July 6, 1889
Striking laborers employed by contractors on street and sewer improvements in Duluth, Minnesota, attempt to break through the police presence protecting scabs doing their work. The police opened fire and a gun battle ensued that resulted in the deaths of four workers and a bystander; many more were seriously wounded. The state militia was called in and drove the workers back with fixed bayonets. Strike leaders were arrested and the police who participated were given gold medals.