USA HISTORY

Detailed explanation-1: -Russia. Hint The First World War was fought between the Allied Powers and the Central Powers from 1914 to 1918. The Allied forces, also known as the Allies, were allied opposition to the Central Powers (Germany, Austria-Hungary and Turkey) in World War I or to the Axis powers (Germany, Italy and Japan) in World War II.

Detailed explanation-2: -British Prime Minister Winston Churchill once said, “The only thing worse than having allies is not having them.” In World War II, the three great Allied powers-Great Britain, the United States, and the Soviet Union-formed a Grand Alliance that was the key to victory.

Detailed explanation-3: -Only 14 countries remained officially neutral throughout the entire war. They included Sweden, Switzerland, Spain, Portugal, Ireland, Turkey, Yemen, Saudi Arabia and Afghanistan as well as the microstates of Andorra, Monaco, Liechtenstein, San Marino and Vatican City.

Detailed explanation-4: -When World War II started, the Soviet Union was effectively an ally of Nazi Germany in a relatively conventional European interstate war. Although the Germans did most of the fighting in Poland, the Soviet Union occupied the eastern part.

Detailed explanation-5: -The Soviet Union, which initially had a nonaggression pact with Germany and participated in its invasion of Poland, joined the Allies in June 1941 after Operation Barbarossa, the German invasion of the Soviet Union.