This article recently appeared on CNN. It talks about he cooperation between the US and China during WWII. There is a certain Guizhou Road that took a lot of American traffic, resupplying the Chinese in the fight against Japanese aggression.
This is a great article that shows the cooperation between the USA and China during WWII. Ray Mahoney, writing for www.tourguizhou.net reported something similar back in August of 2013: