Answer:
easily fight and conquer enemies.
Explanation:
During this period, Europe was going through lots of unrest and there was an effectual struggle to unify Christendom under the rule of the Pope. At the same time, Asia never had any momentous empire at that period of time to challenge the Mongols' either.
The Mongols who suddenly came to prominence in the world’s affairs within a short period of time could easily fight and conquer enemies as a result. This might have influenced Wells’ conclusions that the Mongols' conquests were without parallel.