First Nagorno-Karabakh War
Seeing political and military chaos happening in Azerbaijan, however, Armenia took back control of Martakert as well as most of the northern area of Nagorno-Karabakh on 27 June. Almost a month later on 23 July, they put Aghdam under their control. As a result, Azerbaijan lost five regions and the northern part of Nagorno-Karabakh that equal to nearly five thousand square kilometers in total.