Took part in operations against the British and was known as a courageous fighter. In 1946 was appointed commander of the Fighting Force in the Jerusalem District. Took part in many anti British operation. Among others, blowing up the King David Hotel, commanded the attack on Schneler camp and and took part in the War of Independence. He planed the attack on Arab Village Deir Yassin and when the British left Jerusalem, on May 14, 1948, he led the capture of the Police Academy at Sheikh Jarah.
When the Arab Legion launched a counter-attack, Gal was killed by a shell.