Who supported mao in his fight against the nationalists?

Chinese nationalism targets against two major groups: Japan, which invaded China in 1931–1945, and Secessionism like Tibetan independence, Xinjiang independence, Taiwanese independence, Hong Kong independence, occasionally Mongolian independence, and their supporters like USA and India.

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.