Egypt supports the republicans, Saudi Arabia the Caliph's party. Aden joins The South Arabian Federation. Independence for People's Republic South Yemen. Treaty between the two groups of the civil war in the north. Military conflict between the northern and the southern Yemen.
Peace treaty concludes with a forthcoming unification of the two countries.
Coup in the north. Treaties on unity are signed. Ali Abdallah Salah becomes president of the united Yemen. Referendum on new constitution. Unstable conditions and popular unrest.