So's an 80 year war in general. It's clearly some Afghanistan-style war, with Rheinland sitting all its ships in a big system it dominates but is essentially impossible to fully control, and haemorrhaging money slowly over 80 years from constant harrassment.
Rheinland annihilated itself by trying to occupy land it couldn't hold from an enemy it couldn't defeat.
Also, wiping out stuff like that isn't totally unheard of. 6 day war, pearl harbour. That's stuff that happened in hours, not decades.
