It will take years, they say.
Let me provide a clue: The US has demonstrated again and again that it is absolutely incompetent to train one side of a civil war. Vietnam, Iraq, Afghanistan. Like all our other proxy armies, they will show up to get they paychecks until they are faced with actual combat, at which point they will flee like mice before a cat.
My guess is that the root problem is that we are selling something that they aren't buying, but it probably doesn't matter.