Prussia was subsumed into a unitary state.
Federalism is the mixed or compound mode of government , combining a general government ( the central or ` federal ' government ) with regional governments ( provincial , state , cantonal , territorial or other sub-unit governments ) in a single political system . Prussia . The Kingdom of Prussia was thus abolished in favour of a republic -- the Free State of Prussia , a state of Germany from 1918 until 1933 . From 1933 , Prussia lost its independence as a result of the Prussian coup , when the Nazi regime was successfully establishing its Gleichschaltung laws in pursuit of a unitary state .