He went on to become one of the heads of the labor movement and a founding member of the socialist Ahdut HaAvoda party .
From 1931 -- 1940 , he was a member of the national Haganah command center .
member went on to become one of the heads of the labor movement and a founding member of the socialist Ahdut HaAvoda party .
From 1931 -- 1940 , he was a member of the national Haganah command center .