The name for a very small number of troops from opposing armies getting it on in a warry way. If they were getting it on in a naughty way it would be called Big Boys in Boots Volume 3.
Well, technically ... they dont NEED to be from opposing armies to qualify for the term skirmish. However...
- If they are friendly and its a firefight, this will lead on to a Friendly Fire incident.
- If its simply a punch up in the pub; this will lead to journos getting all self righteous in the tabloid press the next day.