For nearly three decades, Syria maintained a complex, often brutal military occupation of Lebanon.

Wars & Conflicts · Published 15 October 2026 Swipe more like this →

In short: Beginning in 1976, Syria exerted profound influence over its neighbor, shaping Lebanese politics and society through military force and intelligence operations. This occupation, which lasted until 2005, was marked by proxy warfare, internal civil conflict, and the controversial integration of Lebanese security under Syrian control.

The Syrian military intervention in Lebanon began on May 31, 1976, during the Lebanese Civil War. Initially, Syria aimed to restore pre-war limits on Palestinian guerrilla activity, a move welcomed by Maronite leaders but rejected by Palestinian factions. By October 1976, the Arab League legitimized the presence by expanding a small peacekeeping force into a larger Arab Deterrent Force, which was composed almost entirely of Syrian troops. This intervention was not merely a peacekeeping effort; the Assad regime promoted the concept of 'Greater Syria,' viewing Lebanon as an integral part of its own nation and a strategic buffer against Israel.

Throughout the occupation, Lebanon became a theater for proxy warfare involving numerous foreign powers, including Iran, Iraq, Libya, and the Soviet Union. Syria’s influence was cemented by the 1991 Treaty of 'Brotherhood, Cooperation, and Coordination,' which formally assigned Syria the responsibility of protecting Lebanon from external threats. This period saw the rise of rival administrations, such as the military government of Michel Aoun in East Beirut and the civilian government of Selim el-Hoss in West Beirut, the latter of which enjoyed Syrian backing. The occupation was characterized by significant human rights concerns, including over 643 forced disappearances and the detention of thousands of civilians by Syrian forces and intelligence agencies.

The Syrian presence eventually faced intense domestic and international pressure, particularly following the 2005 assassination of former Lebanese Prime Minister Rafic Hariri. This event triggered the Cedar Revolution, a public uprising that demanded an end to Syrian influence. In response to these developments and the adoption of UN Security Council Resolution 1559, Syrian President Bashar al-Assad announced a withdrawal. Syrian forces completed their full departure from Lebanon on April 30, 2005, ending 29 years of military occupation. The legacy of this era remains a defining factor in contemporary Lebanese political dynamics and the ongoing relationship between the two nations.

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