This manual offers students to read and analyze documents related to the relations of the Republic of Armenia with the Collective Security Treaty Organization (CSTO), the North Atlantic Treaty Organization (NATO) . The relevant sections present a variety of original documents of the Republic of Armenia, CSTO and NATO. Text of the manual is intended for students of the Institute of International Relations and World History of UNN , students at the bachelor's and master's degrees in the field of "Foreign Regional Studies" , as a tool for mastering the disciplines "Foreign Policy Formation Process" , "History of foreign regions" , "Foreign policy of the countries of Transcaucasia" .