Greek military personnel total 364,050, of whom 142,700 are active and 221,350 are reserve. Greece ranks 28th in the world in the number of citizens serving in the armed forces. Mandatory military service is nine months for the Army and one year for the Navy and Air Force. Additionally, Greek males between the ages of 18 and 60 who live in strategically sensitive areas may be required to serve part-time in the National Guard.