Several Il-67 transport aircraft have taken off from Ulyanovsk, carrying the first batch of peacekeeping troops, the Russian Defense Ministry has confirmed around 2:30 am Moscow time on Tuesday (2330 GMT Monday).

A video released by the Defense Ministry shows a convoy made up of trucks, armored personnel carriers and other support vehicles making its way to the region as well.

The agreement, which went into effect at midnight Moscow time, envisions the deployment of 1,960 Russian troops, 90 armored vehicles, and 380 other vehicles.

The Defense Ministry said that the 15th Detached Motorized Rifle Brigade from the Central Military District will be designated as peacekeepers and form the mainstay of the deployment. Their command post will be set up near Stepanakert, the capital of the disputed region.

These troops will replace the Armenian forces currently deployed along the line of control, and secure the corridor between the remaining territory of Nagorno-Karabakh and Armenia proper after territorial concessions Yerevan had pledged to make to Baku. The agreement envisions them staying for five years, with an automatic 5-year extension unless one of the sides objects.

The armistice, which Azerbaijani President Ilham Aliyev praised as “historic” and Armenian PM Nikol Pashinyan described as “painful” but necessary, comes after six weeks of heavy fighting in the area. 

Nagorno-Karabakh, an ethnic Armenian enclave once within the borders of the Soviet Republic of Azerbaijan, seceded in 1991 as the Soviet Union began to collapse. The conflict was frozen by an armistice in 1994, but flared up again at the end of September. 

The situation was aggravated by the fact that Azerbaijan received active support from NATO member Turkey, while Armenia is a member of the Collective Security Treaty Organization, a military alliance with Russia.

Azerbaijan said that Turkish peacekeepers will also be deployed in the region, offering no further details. Ankara has backed Baku in efforts to resolve the conflict over what Azerbaijan calls “occupied territories.”

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