During this time, and independently of Haganah or Plan Dalet, irregular troops from Irgun and Lehi formations massacred 107 Arabs at Deir Yassin. The event was publicly deplored and criticised by the principal Jewish authorities and had a deep effect on the Arab population's morale. At the same time, the first large-scale operation of the Arab Liberation Army ended in a debacle, as they were roundly defeated at Mishmar HaEmek. Their Druze allies left them through defection.