The notion that any large scale military intervention is to promote freedom and democracy for others is in itself delusional.  After all it wouldn't take much to depose that goon Mugabe, but no one is going to bother.  Nations go to war with other nations when their own perceived vital national interests are at stake.  The US is not going to put its own troops in harms way just to get rid of some tinpot dictator if there is nothing in it for them.  The problem for the US is that it has outsourced the definition of its "vital national interests" to a small coterie of corporate interests.

"It's a mystery to me - the game commences, For the usual fee - plus expenses, Confidential information - it's in my diary..."