11.1 in the DoD Law of War is the Occupation chapter.

11.1 INTRODUCTION
This Chapter addresses military occupation. The GC provides specific rules for the internment of protected persons in occupation, which are addressed in Chapter X.

Military occupation is a temporary measure for administering territory under the control of invading forces, and involves a complicated, trilateral set of legal relations between the
Occupying Power, the temporarily ousted sovereign authority, and the inhabitants of occupied
territory.

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