"By 1938, Carlson was writing to President Roosevelt saying basically China is fighting America's war for it," said U.S. historian Stephen R. Platt.

Why did U.S. Marine officer Evans Carlson see the Chinese People's War of Resistance Against Japanese Aggression as a fight for the wider world -- even the distant United States? 

This is Episode 4 of 4 in Seeing Is Believing: The Story of a U.S. Marine Officer Embedded in CPC-led Anti-fascist Forces.

Episode 1: xhtxs.cn/6pY; Episode 2: xhtxs.cn/6t6; Episode 3: xhtxs.cn/6t5.     

Produced by Xinhua Global Service■