 Complete the following phrase:  The current conflict over Nagorno-Karabakh began in 1988 when Armenian demonstrations against Azerbaijani rule broke out in NagornoKarabakh and later in Armenia and the Nagorno-Karabakh Supreme Soviet voted to secede from Azerbaijan and join Armenia. Soon, violence broke out against Armenians in Azerbaijan and Azeris in Armenia. In 1990, after violent episodes in NagornoKarabakh and Azerbaijani cities like Baku, Sumgait and Kirovabad, Moscow declared a state of emergency in Karabakh, sending troops to the region, and 