You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "when did the us and ussr become allies?" whose answer is June 1941.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the us and ussr become allies
Useful Output:

Doc 1: Even before the United States entered World War II in December 1941, America sent arms and equipment to the Soviet Union to help it defeat
Doc 2: It was, instead, an extended competition between the United States and the Soviet Union, along with their respective allies. In 1991, the
Doc 3: The Grand Alliance: a three-way shotgun marriage. On January 1, 1942, less than a month after Pearl Harbor, the U.S,, Great Britain and the USSR
Doc 4: The war in Europe began on 23 August 1939, when the Soviet Union and Nazi Germany signed a pact that created a partnership between them in
Doc 5: After Nazi Germany attacked the Soviet Union in June 1941, America sent the first convoys with goods to the Soviet Union by August. The scope of