Before World War I, the government reaction to labor dissent had been local, ad hoc, and quasi-military. Sheriffs, mayors, or governors would deputize strikebreakers or call out the state militia, usually at the bidding of employers. When the United States entered the conflict in 1917, government and industry feared that strikes would endanger war production; a more coordinated, national strategy would be necessary. To prevent stoppages, the Department...