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 vietnam war started and ended?" whose answer is 1 November 1955.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the vietnam war start and end
Useful Output:

Doc 1: The period beginning on August 5, 1964, and ending on May 7, 1975, inclusive, in all other cases. At 54 minutes after midnight on
Doc 2: The conflict in Vietnam, which began as a colonial uprising in the 1940s, would eventually become a devastating multinational war.
Doc 3: The U.S. war in South Vietnam can be divided into two phases. The first, or “advisory,” phase stretched from Nov. 1, 1955, to March 8, 1965.
Doc 4: The Vietnam War (1 November 1955 [A 1] – 30 April 1975) was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam (Democratic Republic
Doc 5: Congress considers the Vietnam Era to be “The period beginning on Feb. 28, 1961 and ending on May 7, 1975 … in the case of a veteran who