Shortly after assuming power in 1962, Ahmad's son, the Crown Prince Muhammad al-Badr was deposed by revolutionary forces, who took control of Sana'a and created the Yemen Arab Republic (YAR). Egypt assisted the YAR with troops and supplies to combat forces loyal to the Kingdom. Saudi Arabia and Jordan supported Badr's royalist forces to oppose the newly formed republic starting the North Yemen Civil War. Conflict continued periodically until 1967 when Egyptian troops were withdrawn.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.