The private military contractor was the legal term for mercenary, it was also a term that gave all the head of the states a headache, but they were unable to part away from it.
They act ruthlessly and treat war like a business. To complete the mission, they could ignore international laws, disregard civilian casualties, toss aside any moral concerns, and complete the most challenging task using the lowest costing method. They have a despicable name, but their hirer would not need to burden their terrible reputation. They were more effective than an army.
Talking about the mercenary, the UA must be mentioned here. There is no other country that has a better understanding of mercenaries than them. Similar to how only thugs could understand gangsters.
