Russia
The Russian military is divided into the Ground Forces, Navy, and Air Force. There are also three independent arms of service: Strategic Missile Troops, Aerospace Defence Forces, and the Airborne Troops. , the military comprised over 1 million active duty personnel, the fifth largest in the world. Additionally, there are over 2.5 million reservists, with the total number of reserve troops possibly being as high as 20 million. It is mandatory for all male citizens aged 18–27 to be drafted for a year of service in Armed Forces.
Military service
Serbia abolished compulsory military service on 1 January 2011. Before that, Serbia had compulsory national service for all men aged between 19 and 35. In practice, men over 27 were seldom called up. Service was usually performed after university studies had been completed. The length of service was 12 months, then reduced to 9 months but was reduced to 6 months in 2006. There was also an alternative for conscientious objectors which lasted 9 months. Serbian nationals living outside of the country were still expected to complete national service; however, they could defer it if it would have seriously affected their career in the country where they then resided. This could be done by contacting the embassy in the country of residence (if under 27), or done by contacting the army directly (if over 27).