The Selenga 2018 Russian-Mongolian military drills started on Tuesday in Russia’s Republic of Buryatia, which is located in Eastern Siberia.

The annual drills involve over 1,000 troops, including 500 servicemen from Mongolia, and up to 200 pieces of military equipment, namely infantry combat vehicles, armored personnel carriers, tanks, multiple rocket launchers and mortars.

During the active phase of the exercise, the troops of the two countries will simulate jointly fighting terrorists in coordination with a tactical airborne assault force.

The drills will last till Oct. 12.