Chinese soldiers
The Chinese soldiers had dispersed over 300,000 soldiers to North Korea as a result of USA failure to honor the 13th parallel agreement. The USA forces were caught unaware and had to tactically withdraw to south Korea, which resulted in the truce and not removal of the communist regime in North Korea.
Many Americans were against getting involved in a War that was being fought in Europe though begrudgingly Americans became aware there was danger on the High Seas as Atlantic waters became host to submarines while warships dueled in the waters of the South Pacific and Atlantic.
Many Americans, particularly the Wobbles, the IWW International Workers of World (rightly) argued that the main reason for fighting would be to profit by various means profits that would mostly land in the pockets of International Bankers and Industrialist, the Halliburton of the times.
The answer is A no question. The united did not side with the axis and they certainly were not neutral.
The Europeans weren't as interested in Africa because they hadn't known about the diamonds and gold in the soil of Africa.