 Lachin town and the surrounding rayon were the location of severe fighting during the 1990-1994 Nagorno-Karabakh war, and the town has not wholly recovered from the destruction of that war.Lachin is the most important town under Armenian control because of the Lachin corridor, which links Armenia to Nagorno-Karabakh.The Organization for Security and Co-operation in Europe Minsk Group co-chairs noted that "Lachin has been treated as a separate case in previous negotiations."