Imam Ahmad died in September 1962 and was succeeded by his son, the Crown Prince Muhammad al-Badr, whose reign was brief. Egyptian-trained military officers inspired by Nasser and led by the commander of the royal guard, Abdullah as-Sallal, deposed him the same year of his coronation, took control of Sana'a, and created the Yemen Arab Republic (YAR). This fighting sparked the North Yemen Civil War and created a new front in the Arab Cold War, in which Egypt assisted the YAR with troops and supplies to combat forces loyal to the imamate, while the monarchies of Saudi Arabia and Jordan supported Badr's royalist forces opposing the newly formed republic. Conflict continued periodically until 1967 when Egyptian troops were withdrawn. By 1968, following a final royalist siege of Sana'a, most of the opposing leaders reached a reconciliation, and Saudi Arabia recognized the republic in 1970.