A power that creates and protects a government in some foreign place, cannot create a security force to effectively secure that de facto illegitimate government against some challenger who's forces perceive their cause as legitimate.

The US tried and failed in the Philippines in the early 1900s; in Vietnam in the mid 1900s, and in Iraq and Afghanistan in the early 2000s. Each with the building of partner military capacity as the corner stone to the strategy, each a complete failure.

This is not, by the way, in the much touted "Decade of War" lessons learned. We have not learned this lesson.