The Russians, the major power in the USSR joined Britain after the Germany attacked them around 1942, not sure on the year, after they agreed to work together. Germany always planned to take over Russia but needed their help at the start of the war, they thought that Russians were lower people, just like the thoughts about the jews. Germany thought that the Russians wouldn't be able to stop an attack from Germany so they waited for the correct time. The reason why Britain allied with the Russians was it was a major power and needed their help to make sure that Germany would lose the war, however they never truly trusted them.
It was merely a case of "my enemy is your enemy so we must be allies".
Britain had been fighting Germany for almost 2 years and France was partitioned when Germany invaded the USSR so it was almost a relief when she realised she now had a powerful ally.
Because Germany attacked the USSR
Answer this question… Become an ally of the Soviet Union
Soviet Union
That they would get nuclear weapons.
The Soviet Union, the United States, and the worldwide Jewish community were the chief supporters of the right to establish a Jewish State and led the vote to establish Israel. The Arab States and Britain were chiefly opposed to establishment of a Jewish State. After 1953, Britain became a strong ally of Israel and the Soviet Union became one of Israel's chief antaognists.
It did not. In 1939 the Soviet Union had a non-agression pact with Germany which led to the invasion of Poland; a British ally. Not surprisingly, the Soviet Union was seen as a possible enemy, but there was no fighting between Britain and the Soviet Union. When Germany violated the pact and invaded the Soviet Union in 1941, Britain and the Soviet Union found themselves fighting on the same side against Germany, although they were far from the best of friends. After World War 2 they were adversaries again in the Cold War, but still they did not fight, at least not openly.
Answer this question… Become an ally of the Soviet Union
Many times: after 23.08.1944 (become an ally of Soviet Union), after December 1989 (become an ally of US and Israel).
The Soviet Union
Great Britain, the Soviet Union, and France
Fidel Castro was a Cuban leader and communist ally of the Soviet Union.
Become an ally of the soviet union-----APEX
Soviet Union
Major allies were Great Britain and France. Major enemies were the Soviet Union and the People's Republic of China.
Hitler betrayed his ally, the Soviet Union.
Soviet Union
Russia. Or rather, the Soviet Union.
Hitler didn't want to have to fight on two fronts simultaneously. With the Soviet Union as an ally, he'd have that side of Europe "safe" from attack. Hitler wanted the soviet union as an ally because they had a bigger army and he wanted help from them to fight off the other countries that were attacking him.