The US was the only one that provided some tangible but limited help on and off for short periods of time a year and half after the civil war started, but even their effort was disjointed and completely non-committal and ended up not being meaningful due to Obama's hesitation to get entangled in another war. Their only real help was the TOW ATGM supply program, which was pathetic in the limited number of people they transferred those to and the drip supply of missiles they provided that all had to be tracked and recorded. None of that assistance changed the balance or trajectory of the war.
Foreign assistance was absolutely pitiful in the overall scheme of things, and the effort it took to actually finally succeed was almost entirely due to our own blood and internal struggle, with honourable mention to Turkey. They really were the only country that truly stepped up and helped us out in any significant and impactful way, and we will never forget it.