Definition: "Mission six" refers to a series of missions executed by the United States Navy in June 2007, focusing on maritime operations in support of U.S. global security objectives and international humanitarian aid efforts. The term "mission" typically signifies an official task or purpose that a group undertakes, whereas "six" often implies more than one, which is often used to denote this particular mission set up under the auspices of Operation Allied Force (OAF).