In this work there are represented the events that took place in 1918- 1920 in a part of the Armenian Homeland – Artsakh. It is told about the collision of interests of the Superpowers in Transcaucasia at the end of the World War I and about the Turkish-Tatar ambitions towards the Armenian territories. In this monograph the key role is given to the Artsakh liberation struggle. A lot of archival documents are represented in the appendix, many of which haven’t still been put into scientific circulation. The book is addressed to the wide range of readers.