What is a narrow strip of territory projecting from the main territory of one state into another state?

A narrow strip of territory projecting from the main territory of one state into another state is known as a "corridor." This geographic feature often serves as a passageway, allowing access or facilitating transportation between different parts of a state. Corridors can arise due to historical treaties, conflicts, or geographical considerations and may have strategic, economic, or cultural significance. Examples include the Kaliningrad Oblast between Poland and Lithuania.