Armenian and Karabakh forces invaded .
Armenian and Karabakh forces occupied Kalbajar the Nagorno - Karabakh War , due to its strategic location between the former Nagorno - Karabakh Autonomous Oblast and Armenia .
Armenian and Karabakh forces invaded and occupied Kalbajar the Nagorno - Karabakh War , due to its strategic location between the former Nagorno - Karabakh Autonomous Oblast and Armenia .