The Air Force Overseas Long Tour Service Ribbon is issued for completion of a standard overseas service assignment of two years or more in length with additional awards denoted by oak leaf clusters. Long tour credit is awarded for completion of an overseas long tour (2 years) prescribed by Air Force Instructions, or to any member assigned to a United States or overseas location who is subsequently sent under temporary duty orders (to include combat tours) for 365 or more days within a 3-year time frame.