History of the Republic of Egypt
On 22–26 July 1952, the Free Officers, a group of disaffected officers in the Egyptian army founded by Gamal Abdel Nasser, and headed by General Muhammad Naguib, initiated the Egyptian Revolution of 1952 with the overthrowing King Farouk, whom the military blamed for Egypt's poor performance in the 1948 war with Israel and lack of progress in fighting poverty, disease, and illiteracy in Egypt. In the following two years, the Free Officers consolidated power, and, following a brief experiment with civilian rule, abrogated the 1953 constitution, and declared Egypt a republic on 18 June 1953, Muhammad Naguib as Egypt's first President.
Yemen Arab Republic
Following the collapse of the Ottoman Empire in 1918 after the Great War, northern Yemen became an independent state as the Mutawakkilite Kingdom of Yemen. On 27 September 1962, revolutionaries inspired by the Arab nationalist ideology of United Arab Republic (Egyptian) President Gamal Abdel Nasser deposed the newly crowned King Muhammad al-Badr, took control of Sana'a, and established the Yemen Arab Republic (YAR). This coup d'état marked the beginning of the North Yemen Civil War that pitted YAR troops, assisted by the United Arab Republic (Egypt), against Badr's royalist forces, supported by Saudi Arabia and Jordan. Conflict continued periodically until 1967, when Egyptian troops were withdrawn to join the conflict of the Six-Day War. By 1968, following a final royalist siege of Sana'a, most of the opposing leaders reached a reconciliation. Saudi Arabia recognized the Republic in 1970.