Today in Labor History October 3, 1932: All 164 students at Kincaid High School in Illinois walked out to protest their school’s use of scab labor to provide heating coal, in solidarity with their fathers who were striking against Peabody Coal. Also known as the Father-Son strike, the actions came on the heals of the creation of the new Progressive Miners of America (PMA). Thousands of Illinois miners joined the new union in protest of wage concessions by John Lewis of the UMWA. The strikers went to all scab mines and forced the workers to join their new union or leave the mine. They also picketed UMWA mines to protest their wage concessions. The government called in the National Guard to stop the armed conflicts between the two unions.