Lebanon–Syria border

A line that stayed blurred

Mount Lebanon had some autonomy under the Ottomans, but Lebanon as a modern state was created under the French mandate after 1918, separated from Greater Syria. Syria sent troops into Lebanon in 1976, during Lebanon’s civil war, and kept a presence and heavy influence there until protests forced its withdrawal in 2005.^[2]

The border, about 375 km long, has never been demarcated despite years of effort. Its rugged terrain and the historical absence of the Lebanese state made it ideal for smuggling. During Syria’s war Hezbollah extended its authority across it, and on the Syrian side Maher al-Assad’s 4th Armoured Division worked with smuggling syndicates in Lebanon, according to analysts quoted by Al Jazeera.^[1]

“the Syrian-Lebanese border – and the zones of influence along it – is being redrawn”^[1]

After al-Assad

In March 2025 three Syrian soldiers were killed near the Zeita Dam west of Homs. Syria’s interim government said Hezbollah fighters had seized and executed them; Hezbollah denied any involvement; Lebanon’s information minister said the men were smugglers. Syrian troops shelled Lebanese border towns and Lebanon’s president ordered the army to return fire. Seven Lebanese citizens and ten Syrian soldiers were killed before a ceasefire on 17 March.^[1]

Syria’s new government says it wants a relationship between equal states. It suspended the Lebanese–Syrian Higher Council, seen as a symbol of Syrian tutelage, and an analyst told Al Jazeera that border control and demarcation top Damascus’s priorities with Lebanon. Lebanon’s prime minister visited Damascus for the second time in May 2026.^[2]