CUSTOM MADE RUSSIAN IMPERIAL ARMY SIZE 7 1/4. MADE IN SERBIA. The Imperial Russian Army (Russian: Ру́сская импера́торская а́рмия, tr. Rússkaya imperátorskaya ármiya) was the land armed force of the Russian Empire, active from around 1721 to the Russian Revolution of 1917. In the early 1850s, the Russian army consisted of more than 900,000 regular soldiers and nearly 250,000 irregulars (mostly Cossacks).