Countries create their armies to defend their land, others to acquire more land, others to steal other people's wealth, and there are others who send their own armies to kill and get killed to serve some other people on the other side of the planet for free. Sorry, not for free, they actually pay those other people more money in addition to protecting them..!
I'm not sure what the commanders of the US army are told when they're sent to protect business interests for their politicians, and to be precise to the un-elected politicians with dual citizenship, and they get injured, paralyzed in many cases, and dead in other cases?
The image source: New Syria FB page