The ceasefire with the Syrian Democratic Forces, a U.S. ally against the Islamic State, came after the group lost much of its territory in a weekend of clashes.
The new unity deal also calls for a cease-fire. Government forces have taken over a number of strategic assets from the Kurdish-led militia in recent days, weakening the force.
U.S. forces killed a terrorist operative linked to al Qaeda who was directly connected to a December ambush that killed two American service members and a civilian interpreter in Syria, the Pentagon announced Saturday.
As allies like Venezuela, Syria and Iran get picked off or bombed, Putin's international promises are regarded as more hollow than ever and his lies less convincing.