“Recent weeks have witnessed a growing competition in eastern Syria between U.S.-backed forces and Iranian-led militias, putting the two rival countries on a collision course. To secure a ‘land corridor’ between its eastern border and the Mediterranean, Tehran and its proxies have been willing to confront U.S. forces directly, sending drones and jets to target coalition soldiers in southeastern and northeastern Syria.”
Source: Where to Draw the Line Against Iran’s Mideast Takeover