Syrian civil war morphs into proxy war between U.S., Russia

The Syrian civil war is now a proxy war between Russia and the United States, with each side fueling the conflict with more firepower.

In the latest maneuver, the U.S. sent 50 tons of ammunition to rebels trying to topple President Bashar al-Assad and four decades of his family's rule.

That came after Russia went to the aid of Assad, saying it's targeting ISIS but launching airstrikes on rebel-controlled areas.

There's a lot at stake in Syria. More civilians getting killed every day. Millions of refugees fleeing to other countries. And the threat of ISIS setting up even more terror hotbeds in the volatile country.

Here's what the situation looks like now:

U.S. gives rebels tons of ammo

This week, U.S. military cargo planes gave 50 tons of ammunition to rebel groups in northern Syria, using an air drop of 112 pallets.

C-17s, accompanied by fighter escort aircraft, dropped small arms ammunition and other items like hand grenades in Hasakah province in northern Syria to a coalition of rebels groups vetted by the U.S., known as the Syrian Arab Coalition.

All pallets successfully were recovered by friendly forces, a U.S. official said.