Ahmad bin Yahya
The Alwaziri coup ( "al-thawra ad-dustūr al-Yamaniyya"), also referred as the Yahia clan coup was a violent dynasty overthrow attempt in the Mutawakkilite Kingdom of Yemen in 1948, which created a great deal of violence and ended with around 5,000 fatalities. During the coup attempt, Imam Yahya Muhammad Hamid ed-Din, the ruler of the kingdom, was killed and the rival Sayyid family, the Alwazirs, seized power for several weeks. Backed by the al-Saud family of Saudi Arabia, the Hamidaddins restored their rule. After deposition of the Alwaziris, the restored monarchy of Imam Yahya was succeeded by his son Ahmad bin Yahya.