The book is devoted to an important institution of modern international humanitarian law - the law of military occupation. In situations of foreign occupation, we introduce a special legal regime, the distinctive feature of which is the interaction of the three legal systems: national law of the occupied state, national law of the occupying powers and the international (international humanitarian) law. It is noted in the work that existing international documents do not contain unambiguous answers to a number of practical problems arising in situations of military occupation, and do not correspond to modern trends in the development of international law and order in a number of parameters. The author focuses on the current problems and peculiarities of the law of military occupation of the Armenian Republic, which caused and continues to cause an infinite number of humanitarian disasters to Azerbaijan and its people. In this regard, the author analyzes a large number of official statements of Azerbaijani leaders, international documents and presents his own point of view on the current state of the international law institution.