He joined the Communist Party of Germany ( KPD ) in 1920 and took several courses at the Marxist Workers ' School .
Born in Leipzig , the son of a metalworker , Uhrig grew up to become a journeyman toolmaker .
Uhrig joined the Communist Party of Germany ( KPD ) in 1920 and took several courses at the Marxist Workers ' School .
Born in Leipzig , the son of a metalworker , Uhrig grew up to become a journeyman toolmaker .