. "Operation Ring (Russian: \u041E\u043F\u0435\u0440\u0430\u0446\u0438\u044F \u00AB\u041A\u043E\u043B\u044C\u0446\u043E\u00BB, Operatsia Koltso; Armenian: \u00AB\u0555\u0572\u0561\u056F\u00BB \u0563\u0578\u0580\u056E\u0578\u0572\u0578\u0582\u0569\u0575\u0578\u0582\u0576, Oghak gortso\u011Fut'yun), known in Azerbaijan as the Chaykend Operation (Azerbaijani: \u00C7ayk\u0259nd \u0259m\u0259liyyat\u0131) was the codename for the May 1991 military operation conducted by Soviet Internal Security Forces and OMON units in the northern regions (Shahumyan, Shusha, Martakert and Hadrut) of Nagorno-Karabakh Autonomous Oblast of the Azerbaijan SSR and in a number of bordering regions of the Armenian SSR (Noyemberyan, Goris and Tavush). "@en . . . . "Azerbaijan SSR" . "*23rd Motorized Rifle Division of theSoviet 4th Army" . "1991-05-15Z"^^ . "*Dashnaktsutyun" . . "Unknown" . . "Armenianmilitiamen & volunteers" . . "Deportation of thousands of Armenians from the region" . "*OMON" . . "Operation Ring"@en . . . "Unknown; civilian deaths, including ethnic Armenian police force, estimated to be 30\u201350" .