National Museum of History of Azerbaijan continues collection of materials devoting Armenian-Azerbaijani Nagorno-Karabakh conflict, a bloody page of the history of Azerbaijan. The visual observation device of armored vehicles used in the Karabakh war has recently been donated to the museum. Elnur Sharifov, the reserve Colonel-lieutenant of the Karabakh war, presented the device to the museum. The exposition is an important part of Azerbaijan's military history.