What continents were not involved in World War 2?

Answer 1

Of course, most action took place in Europe and Asia, with significant fighting in Africa. Australia and N America both had some small amount of fighting - Pt. Darwin in N Australia being raided by Japanese and the N American continent having German submarine activity within a few miles of the Gulf and Eastern Coastlines. Also N America suffered a few raids from Japanese submarine bombardment and the balloon bomb attacks in the west. Japanese troops occupied two small islands, Attu and Kiska, in Alaska in 1942. That leaves S America - late in the war Brazil joined the Allies but there was never any fighting on or near the continent and I know of no serious actions that employed South American troops. If by involvement you mean economic activity then all continents were affected. WWII was a true world war involving every populated continent to some extent.