This country's communists were purged in a civil war that followed its 1990 reunification.
A  ruler in this modern-day country clashed with the Idrisid rulers of Asir over the Tihama region, and negotiated the Treaty of Daan with the Ottomans. In this country, a group that was founded as the "Believing Youth" religious movement is part of a Shi'ite sect that reveres a man who was betrayed by the people of Kufa, and who was the great-grandson of Ali. The 2004 killing of a (*) Zaydi cleric in this country's northern Saada province sparked its government's conflict with a group sometimes called Ansar Allah. Imam Yahya founded the Mutawakkilite Kingdom in the north of this modern-day country, while the overthrow of a British Protectorate established a Communist state in its south. This country's communists were purged in a civil war that followed its 1990 reunification. For 10 points, name this country where Houthi rebels have deposed Abd Rabbuh Mansur Hadi, and where the Arab Spring toppled dictator Ali Abdullah Saleh.
A  ruler in this modern-day country clashed with the Idrisid rulers of Asir over the Tihama region, and negotiated the Treaty of Daan with the Ottomans.
Yemen (or al-Yaman)