Chocolate Workers' Sit-down Strike. Hershey's Chocolate Workers Local 1 (CIO) responded to a labor-management impasse on April 2, 1937 by initiating the first sit-down strike in Pennsylvania and in the confectionery industry. The strike was ended by strike-breaking violence and government mediation. The union lost two subsequent representative elections. In 1939 workers affiliated with the Bakery & Confectionery Workers Local 464 (AFL).