This is the one I told you about, where I was at the lamppost and they suddenly attacked me, Olivia dancing Veronica. Second time it has happened so far. It was weird. I was lucky to walk away from it, having lost 2-3 men.
Happens because of Restore+, making Veronica get rid of the buffs on Hector from the Armour school, leaving her in a spot that can reach units behind the lamppost.