Great video that gives history on the Chicago Memorial Day Massacre.
Here is info taken from Wikipedia regarding the Memorial Day Massacre:
In the book Selected Writings by Dorothy Day (who was present), the events of the protest are summarized thus:
‘On Memorial Day, May 30, 1937, police opened fire on a parade of striking steel workers and their families at the gate of the Republic Steel Company, in South Chicago. Fifty people were shot, of whom 10 later died; 100 others were beaten with clubs.
Tags: 1937, Chicago, Chicago Police Brutality, CIO, Congress of Industrial Organizations, Denial of Union Members Human Rights, Denial of Union Rights, Dorothy Day, Labor, Labor History, Little Steel Strike, Massacre, May 30, Memorial Day, Republic Steel Company, Sam's Place, Steel Workers Organizing Committee, SWOC, Union