The Vikings had these...flying creatures called dragons and no one else really had those laying around so I would say they had that as a advantage.
HOPE THIS works
Explanation:
Teotihuacan
The Teotihuacan Period: 200-900 CE – During this era the great city of Teotihuacan grew from a small village to a metropolis of enormous size and influence. Early on, Teotihuacan was a rival of another city called Cuicuilco but, when that community was destroyed by a volcano c.
Number i is a , number 2 is c and number 3 is d i think
