Spent some time last night, with a 20 year E8 (Master Sergeant) Special Forces. MOS 18B, weapons specialist. Served in Iraq I 1991, Somalia, Afghanistan, Iraq II and has several injuries. Planning to go back to work as a civilian contractor.
He says the military is restrained from doing the entire job over there.
Think back to Vietnam, when Johnson was criticized for having to approve of every mission, etc.
Now think about today, when Obama can't make decisions, whatsoever.
No wonder Russia and ISIS/ISIL decided to just go ahead. It proved right to just go ahead.
Expect more of the same instability until Obama leaves office. It is a safe wager.