who was involved in ww2
Quick Facts. Countries involved in World War 2 joined either the Allies or the Axis Powers. The Allies from World War 1 â Britain, France, Russia and the United States once again formed the core of the anti-German coalition.eutral Countries. Few countries remained neutral during the entire World War 2: Switzerland, Sweden, Spain, Portugal, Iceland, Ireland, Afghanistan, North Yemen, Oman, Nepal, Tibet, and the above mentioned Spanish and Portuguese colonies in Africa.