"Again, I repeat: We’re not considering any open-ended commitment. We’re not considering any boots-on-the-ground approach."
__The Obama, 20 August 2013
"And in no event are we considering any kind of military action that would involve boots on the ground; that would involve a long-term campaign."
__The Obama, 20 August 2013
"Now, after careful deliberation, I have decided that the United States should take military action against Syrian regime targets. This would not be an open-ended intervention. We would not put boots on the ground."
__The Obama, 31 August 2013
"What we’re talking about is not an open-ended intervention. This would not be another Iraq or Afghanistan. There would be no American boots on the ground."
__The Obama, 7 September 2013
"This will not be Iraq or Afghanistan. There will be no American boots on the ground — period."
__National Security Advisor Susan Rice, 9 September 2013
"I will not put American boots on the ground in Syria."
The Obama, 10m September 2013
"With respect to the situation on the ground in Syria, we will not be placing U.S. ground troops to try to control the areas that are part of the conflict inside of Syria."
__The Obama, 5 September, 2015
"I want the American people to understand how this effort will be different from the wars in Iraq and Afghanistan. It will not involve American combat troops fighting on foreign soil."
__The Obama, 10 September 2015
"The President has ruled out the option of deploying American boots on the ground in Iraq and in Syria in a combat role."
__Press Secretary Josh Earnest, 19 September 2015
"I won’t commit our troops to fighting another ground war in Iraq, or in Syria."
__The Obama, 20 September 2015
"Syria: Obama Authorizes Boots on Ground to Fight ISIS"
__CNN Headline 30 October, 2015
100 Boots On The Ground are about to be placed into Syria.
n.b. The National Security Advisor's use of the word "period" in the statement of 9 September 2013 should've been a clue.