Ukrainian special forces are attacking Russian mercenaries and positions in Syria, according to the Kyiv Post, fighting alongside rebel forces.

The deadly attack on U.S. forces in Syria underscores the challenges facing the new Syrian president one year into his rule of the fractious nation.

Three members of the U.S. military were killed in Syria on Sunday in an ambush by an ISIS attacker. Other Americans and Syrians were wounded, all of which happened about a year after Syria's civil war ...