Ahmad bin Yahya
Imam Ahmad bin Yahya of Yemen joined the Arab endeavors to unify their ranks when he signed the joint defense agreement with Egypt, Saudi Arabia, and Syria. This event took place after the Imam's meeting with King Saud, President Gamal Abdel Nasser, and President Shukri al-Quwatli on 21 April 1956, following the Jeddah Pact between Saudi Arabia and Yemen.