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
The following thirty-one countries have been identified as having compulsory military service terms longer than 18 months:
, three countries have been identified as intending to abolish conscription in the near future:The following nineteen countries have been identified as having no defense forces or as having no standing army but having very limited military forces:Compulsory military service has declined considerably since 1970. A 2016 study finds "that the probability of a shorter military service time is positively associated with smaller country populations, smaller lagged army sizes, increases in primary schooling among young males, and having common law legal origins."