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.
Conscription in Russia
Immediately prior to the outbreak of World War I, the Imperial Government imposed compulsory service of three years for entrants to infantry and artillery regiments and four years for cavalry and engineers. After completing this initial period of full-time service, conscripts passed into the first class reserves for seven years. Final obligation for compulsory service ended at age 43, after eight years in the second reserves.