A little-known episode in 1919 in which Armenians (Christians) massacred 3,000 'mountain' Jews in Azerbaijan for failing to fight Muslims. These tragic events which took place during 1918-1919 in Guba city where there were mass killings of Mountain Jews committed by Armenian bandits. According to the witnesses and some documents, together with Azerbaijanis more than 3000 Jews were killed.
 

They only identified 87 names. Each year on March 31st, on the day of Azerbaijanis' genocide of 1918-1919, special requiem prayers for 87 killed Jewish children, women and men are being read in the synagogues. 
 

Jews just rejected proposal to join the Dashnak's brigade against the Muslim population and tried to prevent a bloodshed. But Jewish envoy was brutally killed by the Amazasp's brigade and the mass killings were started.
 

Sources

• http://jewishrefugees.blogspot.com/2006/05/armenians-massacred-azeri-mountain.html
• http://www.today.az/news/politics/25410.html

Image from https://en.wikipedia.org/wiki/File:Guba_mass_grave.jpg  by Gulustan