Your argument is narrow and doctrinaire. A person is not the weapon, it's the organic whole of the army that constitutes a WMD. You seem to be under the mistaken impression that any large group of armed, aggressive, belligerents constitutes an "army." It's an honest mistake, but it is a mistake. Viking hordes were not armies.
I'm done with this though. Arguing this point with you is like the Seinfeld episode when everyone was trying to convince George the Trivial Pursuit answer card was a misprint.
Spain was never invaded by the "Moops."
Oh yes they were, quite as good as anybody's in the area. They were quite good at amphibious operations too.