Obama and Hillary Clinton bypassed normal channels and used the Dept of State as a conduit to supply advanced American weapons, especially our best version of the Stinger shoulder launched anti aircraft missile to Al - Qaeda and other Islamic terror groups in Libya and then tried to round the un used missiles up and buy them back to send them to Syria.
While this is just one aspect of Libya war ( the rest being the graft and corruption of well connected insiders making huge sums of money stealing Gaddafi's $ 2 Trillion fortune), it is by far the most damming because supply of weapons to the enemy in time of war is treason and giving terrorists advanced shoulder launched anti air missiles is really bad policy
...on July 25, 2012, Taliban fighters in Kunar province successfully targeted a US Army CH-47 helicopter with a new generation Stinger missile.
The next day, an explosive ordnance disposal team arrived to pick through the wreckage and found unexploded pieces of a missile casing that could only belong to a Stinger missile.
Lodged in the right nacelle, they found one fragment that contained an entire serial number.
The investigation took time. Arms were twisted, noses put out of joint. But when the results came back, they were stunning: The Stinger tracked back to a lot that had been signed out by the CIA recently, not during the anti-Soviet jihad.
...sources in the US Special Operations community believe the Stinger fired against the Chinook was part of the same lot the CIA turned over to the Qataris in early 2011, weapons Hillary Rodham Clinton’s State Department intended for anti-Khadafy forces in Libya.