Because Finland is not under direct military threat, the current Army is, as it has been since the end of Second World War, in peace-time training formation. This means that its brigades (Finnish: joukko-osasto) are not meant to be operational combat units but training formations. According to the "troop production" doctrine (Finnish: joukkotuotanto), peace-time units will train each batch of conscripts they receive for a specific war-time unit. After the end of training, the conscripts are demobilised into reserve. During regular refresher exercises and in case of a crisis, the reserve unit will be activated and deployed in the formation it trained in during conscription. Thus, the peace-time structure of the Army does not give any meaningful information about the mobilised structure or about the areas where the units would be used.
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 while Finland belonged to Sweden.
The Grand Duchy inherited its allotment system (Swedish: indelningsverket; Finnish: ruotujakolaitos) from the Swedish military organization. However, for several decades, Russian rulers did not require military service from Finland; operations and defence were mostly taken care by Russian troops based in the Grand Duchy. As a result, officer benefits of the allotment system became practically pensions, as payment was based on passive availability, not on actual service.