Gonna be honest, I'm not real sure what the discussion is here. I agree that it was obvious we are set in a time period long after the fall of Rome, probably something early medieval, and as for this shield wall thing... if we only have a few people, it doesn't really seem relevant where it came from or if we would have knowledge of how to do it.

I say put up the OOC whenever you feel like it.

EDIT: Also, Vikings are defined as Norse seafarers from the 8th to 11th centuries, so it seems incorrect to refer to either the Germanic tribes or the Britannic clans that Rome battled with as Vikings.