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: "Gregg A. Sturdevant is a retired United States Marine Corps major general, from February 2012 to February 2013, he commanded the Marines' aviation wing at which 1,600 acre Afghan Armed Forces base in Helmand Province, Afghanistan?" whose answer is Camp Leatherneck.
Each document should contain about 30 words, and these documents should contain useful information.

Query: 1,600 acre base in Helmand Province, Afghanistan
Useful Output:

Doc 1: The 1,600-acre compound also became the home base for America's counter-narcotics program, which is widely seen as a huge failure. Farmers
Doc 2:  helmand Subscribe to Forces TV: http://bit.ly/1OraazC Check out our  Billion Dollar Base: Army Base in Afghanistan | Free Documentary.
Doc 3: USMC Camp Leatherneck, Afghanistan  Camp Leatherneck is a 1,600 acre United States Marine Corps base located in Helmand Province, Afghanistan.
Doc 4: The Afghan Ministry of Defense is planning to use the use the 1,600-acre base to connect with Kabul, and to support its aviation operations. The
Doc 5:  1,600-acre joint forces base that housed over 25,000 troops in the Helmand Province and the surrounding area. She recently ended her career