Battle of Ayrum
The Battle of Ayrum was a military battle fought between the First Republic of Armenia and the Democratic Republic of Georgia on 16 December 1918, it began following an Armenian breakthrough into Lori.

Battle 
Due to the Georgian People's Guard's poor resistance, they had greatly endangered the position of Georgian troops in Ayrum. General Drastamat Kanayan acknowledged this, and on 16 December began a surprise attack on the town during the night, the Armenians were able to catch the Georgians off guard whilst most of their troops were sleeping which allowed them to storm into the town from numerous positions. The Armenians used grenades to blow up the bridges which prevented the Georgians from escaping as this resulted in an devastation of the entire Georgian garrison in Ayrum, as five hundred Georgians which was their entire Ayrum garrison was either killed or taken prisoner.

References 

Conflicts in 1918
History of Armenia
History of Georgia (country)