11º Ejército
On 23 March 1920 the Armenians started protesting in Karabakh with the support of Yerevan. The government of Azerbaijan reacted by sending most of its army to that region and leaving Baku and North regions with little protection. Meanwhile, Russian troops – the Bolshevik Eleventh Army – were conquering North Caucasus, including Dagestan, and coming closer to the borders of Azerbaijan.