Aharon Heichman was born in Warsaw (Poland) in 1911 and immigrated to Eretz Israel at age 19. In 1931, Heichman graduated from a Haganah commander's course, and in 1933 joined the Irgun. He soon founded the Betar company at Kfar Saba and in 1933 served as its commander.
In 1937, Heichman served as Commander of Tel Aviv District and a member of the General Headquarters. Together with Hanoch Kalai, he was one of the first to break the havlaga (self-restraint policy) and he commanded and participated in many defensive operations.
In 1938, Heichman was sent to Poland to organize Irgun cells and commanded a first commanders course there. On return to Eretz Israel, ge organized the disembarkation of illegal immigrants from Af-Al-Pi vessels.
In 1939, Heichman was arrested with members of the General Headquarters and released at the end of 1940. From 1944 to 1946, he was arrested many times and spent most of the time under house arrest.
Heichman returned to activity several months before the state of Israel was established, and commanded a Platoon in the Battalion 35 of the Irgun within the Givati Brigade. HE was wounded during the conquest of Yavneh.
Sources: The Irgun Site