Ancalagon the Black

[denethorthefirst]

Originally Posted by Aster

Well, he made a mistake of separating his armies so that landed valars defeated them one by one.

Maybe the winged dragons weren't ready at the time of the invasion? I also thinks it's very likely that Morgoths insanity diminished his competency as a general/leader. It's also possible that the ensuing erratic behavior led to low morale and infighting among his "staff" and the wider leadership (high ranking umaiar) - Sauron didn't even fight in the War of wrath, he hid himself away and watched the whole spectacle from the sidelines!