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?
Sentence (from "Camp Leatherneck"): The site is mostly in Washir District and is conjoined with Camp Bastion, the main British military base in Afghanistan.
Relevant evidence: No