Team Sunni vs Team Shia in Syria

Syria started out as legitimate peaceful protests by Syrians with legitimate grievances against the Assad regime.

It has now turned into a bloody, vicious war operating on many levels.

U.S. vs Russia
Saudi Arabia vs Iran
Sunni Muslims vs Shia Muslims

The full Team Sunni line up :-
Sunni Islamic Extremists - the "rebels" many of which are foreigners, e.g. Libyans
U.S.
Saudi Arabia
Qatar
France
Turkey
Israel
UK (only non-direct military logistical support is now possible after the UK Parliament's vote on 08/29)
Jordan (Jordan is being used as a base by America to train up insurgents - around 300 are reported to be on the Syrian border or may have already entered Syria)

The full Team Shia line up :-
Assad
Russia
Iran
China
Shia extremists, including groups such as HezBollah

Neutrals

The Arab League
Egypt (under it's new military rulers - the Muslim Brotherhood were on Team Sunni)

100,000 people have already been killed in the bloody Syrian war.
Multiple atrocities have been committed by both sides.