In 1932, he
immigrated to Palestine and joined the
Irgun a year later. In May 1941, during the
Anglo-Iraqi War, he accompanied
David Raziel, who had joined the British Army, on a mission to Iraq to sabotage oil fields on the outskirts of Baghdad. When Raziel was killed, Meridor returned to Palestine and took over as Chief Commander of the Irgun. though he continued to hold senior positions in the Irgun until the
Haganah handed him over to the British in 1945. He was sent to
various detention camps in Africa, and carried out daring escape attempts. He was so eager to escape he refused to take a camp leadership position despite his senior rank in the Irgun. He finally succeeded in escaping in 1948, and arrived in Israel on May 14, the day
independence was declared. His escape was assisted by a Jew from
British-controlled Sudan named Mayer Malka who provided
kosher food and visited him when he was a prisoner in African detention camps. He hid in Malka's home in
Khartoum prior to returning to Palestine. Meridor writes in his biography that Menachem Begin was so overjoyed to hear about his escape, that he sent a communique stating that Meridor arrived in Palestine and took part in an operation in
Pardes Hanna on 7 April 1948, despite the fact that at the time Meridor was in Paris. According to Meridor, this is why it was written in an article in
The Scotsman that the Irgun announced in Tel Aviv on 7 April 1948 that 'Jacob Meridor' had "taken over his war assignment" in Palestine.
The Scotsman also reported that on the previous day, as his first command action, Meridor had led the raid on Pardes Hana military camp south of Haifa, in which six British soldiers and their commanding officer, Lieut-Colonel G.L. Hilderbrand, were killed. Under Begin, he was charged with the task of managing the Irgun's integration in the newly formed
Israel Defense Forces. ==Business career==