It was not futile from the get go as proven by how well they performed under the direction of American troops and advisors.

The obvious overlooked cause is that it was more important for Obama to pull the troops out to make a date than to assure success. There could have easily been a decision made to keep enough support there to assure continued success.

Shows lack of executive capability and displays in spades the political mind set.
As a result ISIS was given a free pass.

No. Do not blame the past and it's objectives. LAy the blame at the feet of the incompetent military understanding of the Commander in Chief....IN NAME ONLY.....not performance of duty.