Thousands were killed in 1986 in the South Yemen Civil War. President Ali Nasser Muhammad fled to the north and was later sentenced to death for treason. A new government formed.
Unification and civil war:
After the invasion of Kuwait crisis in 1990, Yemen’s president opposed military intervention from non-Arab states. As a member of the United Nations Security Council for 1990 and 1991, Yemen abstained on a number of UNSC resolutions concerning Iraq and Kuwait and voted against the “…use of force resolution.” The vote outraged the U.S. Saudi Arabia expelled 800,000 Yemenis in 1990 and 1991 to punish Yemen for its opposition to the intervention.
In the absence of strong state institutions, elite politics in Yemen constituted a de facto form of collaborative governance, where competing tribal, regional, religious, and political interests agreed to hold themselves in check through tacit acceptance of the balance it produced. The informal political settlement was held together by a power-sharing deal among three men: President Saleh, who controlled the state; major general Ali Mohsen al-Ahmar, who controlled the largest share of the Republic of Yemen Armed Forces; and Abdullah ibn Husayn al-Ahmar, figurehead of the Islamist al-Islah party and Saudi Arabia’s chosen broker of transnational patronage payments to various political players, including tribal sheikhs. The Saudi payments have been intended to facilitate the tribes’ autonomy from the Yemeni government and to give the Saudi government a mechanism with which to weigh in on Yemen’s political decision-making.
Following food riots in major towns in 1992, a new coalition government made up of the ruling parties from both the former Yemeni states was formed in 1993. However, Vice President al-Beidh withdrew to Aden in August 1993 and said he would not return to the government until his grievances were addressed. These included northern violence against his Yemeni Socialist Party, as well as the economic marginalization of the south. Negotiations to end the political deadlock dragged on into 1994. The government of Prime Minister Haydar Abu Bakr Al-Attas became ineffective due to political infighting.
An accord between northern and southern leaders was signed in Amman, Jordan on 20 February 1994, but this could not stop the civil war. During these tensions, both the northern and southern armies (which had never integrated) gathered on their respective frontiers. The May – July 1994 civil war in Yemen resulted in the defeat of the southern armed forces and the flight into exile of many Yemeni Socialist Party leaders and other southern secessionists. Saudi Arabia actively aided the south during the 1994 civil war.