Complex sentence: As Duke of Aquitaine, King Edward ruled Gascony as a vassal of the French King, these lands were all that was left from the once great Angevin empire; the kings of France wanted this last English foothold gone too.
Split into simpler sentences: As Duke of Aquitaine, King Edward ruled Gascony as a vassal of the French King, these lands were all that was left from the once great Angevin Empire. The Kings of France wanted this last English foothold gone too.