Conscription in Russia
Conscription in Russia (in Russia is known as or ""universal military obligation"" or ""liability for military service"") is a 12-month draft, mandatory for all male citizens age 18–27, with a number of exceptions. The mandatory term of service was reduced from two years in 2007-2008. Avoiding draft is felony under Russian criminal code and punishable by up to 2 years of imprisonment.
Cossacks
By the end of the 19th century, the Cossack communities enjoyed a privileged tax-free status in the Russian Empire, although they had a 20-year military service commitment (this was reduced to 18 years from 1909). They were on active duty for five years, but could fulfill their remaining obligation with the reserves. In the beginning of the 20th century, the Russian Cossacks counted 4.5 million. They were organized as independent regional hosts, each comprising a number of regiments.