High Quality Content by WIKIPEDIA articles! The armed forces of Yemen include the Yemen Army (includes Republican Guard), Navy (includes Marines), Yemen Air Force (Al Quwwat al Jawwiya al Yamaniya; includes Air Defense Force) (2008). A major reorganization of the armed forces continues. The unified air forces and air defenses are now under one command. The navy has concentration in Aden. Total armed forces manning numbers about 89,500, including conscripts. The Yemen Arab Republic and The People`s Democratic Republic of Yemen joined to form the Republic of Yemen on 22 May 1990.