<Dd> Briggs Manufacturing Strike occurred . </Dd> <Dl> <Dt> 1933 (United States) </Dt> <Dd> Detroit, Michigan, Tool and Die Strike occurred . </Dd> </Dl> <Dt> 1933 (United States) </Dt> <Dd> Detroit, Michigan, Tool and Die Strike occurred . </Dd>

When did us workers win the right to unionize