Reading these comments before watching the ep had me pretty confused. The harpies seemed more of a large street gang than anything approaching an army. They still jumped out and jumped the unsullied patrol and used sneak tactics to do so.

That doesn't seem to be a ridiculous extension of what they have already done on the show (sneak attacks on the unsullied). A lot of ppl don't like dany's rule and 5 able bodied and armed men could reasonably take down one soldier in close quarters