Sudden shift refers to an abrupt change in the location or configuration of internal boundaries within a multinational state. This can occur due to various reasons such as political conflicts, demographic changes, territorial disputes, or secession movements.
Related terms
Territorial Dispute: A disagreement between two or more countries over the ownership or control of a particular territory.
Secession: The act of a region within a country declaring independence and breaking away to form its own separate nation-state.
Devolution: The transfer of power or authority from a central government to regional governments within a country, often done to accommodate diverse ethnic or cultural groups.