Ха-Поэль ха-Цаир
Trade union work played a central role in the MPS. At the 2nd conference of the zionist Railway workers union, held in Jaffa March 6–7, 1920, MPS was the largest bloc with seven delegates. In order to counter the MPS influence in the union, Ahdut HaAvoda and Hapoel Hatzair joined forces. Together the two parties had eight delegates.