In 1938 Meivar formally joined the fighting forces of Haganah; his first commander was Miriam Stern. A short while after the Arab revolt and massacres of Tiberias, he was sent to an officers’ course. Most of his activities involved evading the colonizing British troops, and helping Safed acquire ammunition and weapons. The overall goal was to prepare for future revolts and battles. However, in 1939, at the beginning of World War II, the Arab revolts in Mandatory Palestine ceased.