Azaz is a strategic location.

Did arms go from Benghazi thru Turkey to ISIS/rebels?

Did money flow too?

On 19 July 2012, during the Syrian civil war, rebels opposed to the Syrian government succeeded in capturing the town.[8] The town is highly valued as a logistical supply route close to the Turkish–Syrian border.

ISIL took control of Azaz in October 2013, but withdrew from the city in February 2014 having been cut off from the rest of its territory.[9][10]

Following the departure of ISIL, Azaz was left under the control of Northern Storm, a brigade under the authority of the Islamic Front, nominally a part of the Free Syrian Army (FSA) at that time.[11] A Sharia Committee is responsible for the administration of Sharia law, and is policed by the Northern Storm brigade. A Civil Council governs the field of public services.[12] During its northern offensive in 2015, ISIL approached Azaz, but fell short of directly assaulting the city; taking Kafra and surrounding territory.[13] It wasn't until October 2016 that ISIL forces were finally expelled from the Aleppo governate, and could no longer threaten Azaz. However, a large terrorist attack was conducted in January 2017, with responsibility

being attributed to ISIL.

https:// en.m.wikipedia.org/wiki/Azaz