Between 1809 and 1917 Finland was an autonomous part of the Russian Empire as the Grand Duchy of Finland. Between 1881 and 1901 the Grand Duchy had its own army. Before that several other military units had also been formed. The Diet of Finland made a pact with Tsar Alexander I; Finland paid a tax to Russia as compensation and military service was not called. This lasted until the Crimean War, 1854, during and after which Finland set up some sharpshooter battalions based on rote system.