The Syrian Defense Ministry dispatch reinforcement convoys, consisting of dozens of military vehicles, to the border line following the killing of 3 of Syrian soldiers by Hezbollah on the border with Lebanon, in Homs, Syria on March 17, 2025. (Photo by Ebu Bekr Sakka/Anadolu via Getty Images) BEIRUT — After decades of undefined and at times contentious borders between the two countries, the Lebanese and Syrian governments have signed an agreement to demarcate where each nation’s territory ends.