lol
A loon is just an AI controlled soldier. Also known as dude, guy or moron. It's an old Scots word and describes them perfectly. In general it means a young man, but frequently refers to one who is stupid or not paying attention. It's not particularly derogatory.
There is at least one quotation .... a general (or somebody) commanding a Scottish regiment drawn up for battle pointed at the hordes of enemy soldiers on the top of an adjoining hill. He shouted to his men,
"D'ye see yon loons? Well, if you dinna kill them, they'll kill you!"