Frontier

A frontier is a zone at the limits of a state’s authority, separating it from neighboring territories or peoples. Its boundaries may be shifting, contested, or only loosely administered.

Boundary: A boundary is a line or limit separating places, jurisdictions, or territories. A frontier is a zone of uncertain depth; a boundary is conventionally treated as a line.
Frontier settlement: Frontier settlement is the establishment of communities in regions at the edge of a state's effective control. Settlers can extend a state's presence while creating new disputes over land and authority.
Roman limes: The Roman limes was a system of frontier zones, roads, forts, and defenses around parts of the Roman Empire. It combined military barriers with trade and contact across imperial edges.
Settler colonialism: Settler colonialism is a form of colonialism in which settlers seek lasting control of land and replace or subordinate Indigenous societies. Frontier settlement often became a project of permanent occupation rather than temporary extraction.
Border: A border is a boundary separating political or administrative territories. Modern borders often mark surveyed limits more precisely than historical frontiers.
Colonization: Colonization is the establishment of control over people and territory by an external power or settler population. Many state frontiers expanded through colonization and the displacement of existing societies.
Great Wall of China: The Great Wall of China is a network of fortifications built and rebuilt by successive Chinese states. Its defenses illustrate attempts to manage movement and threats along northern frontiers.
Displacement of Indigenous peoples: Displacement of Indigenous peoples is the forced or pressured removal of Indigenous communities from their lands. Expanding state frontiers frequently transferred land from Indigenous communities to settlers or governments.
Borderland: A borderland is a region shaped by its position between political or cultural territories. Borderlands describe the societies and interactions that develop within frontier zones.
Military frontier: A military frontier is a defended zone organized to protect a state against external threats. Fortifications and garrisons made some frontier zones instruments of defense and expansion.

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