Which of the non-european countries had the greatest impact on the war effort? explain?

America

Explanation:

America was the non- European country to have an impact on the war. America is found in the North American continent.

America had the greatest effect on the war because it supplied its allies with enough soldiers(manpower) and equipments. This support by America made them to be able to defeat Germany in the war.

one of the negative side effects were the economic losses the events of september 11th caused. many, many people lost their jobs as a result of a downturn in the economy after the terrorist attacks.