A Syrian rebel commander said on Thursday rare military exercises with U.S. Marines in southern Syria sent a strong message to Russia and Iran that the Americans and the rebels intend to stay and confront any threats to their presence.

Col. Muhanad al Talaa, commander of the Pentagon-backed Maghawir al Thawra group, told Reuters the eight days of drills that ended this week at the U.S. military outpost in Tanf were the first such exercises with live-fire air and ground assault, involving hundreds of U.S. troops and rebel fighters.

¡°These exercises have a big importance and have beefed up the defenses of the area and raised the combat capabilities and morale and that of civilians in the area,¡± Talaa told Reuters by phone from Tanf, near Syria¡¯s borders with Jordan and Iraq.