<span>the nationalists at the beginning took a back seat to fighintn the japs, then took the brute force task of fighting the japs head on because they had better weapons than the communists</span>
Since you provide no options, one thing that proved to be a major hardship for settlement in the new england Colonies was : food
Back then, the settlers were in the condition where they do not have sufficient foods and they have to suffer through hunger
Hope this helped
Red China fought a war, then chased the government from the mainland.
Warm summers cool winters and soil well suited to growing crops