Representatives from nearly 60 countries, along with CSTO forces and equipment, are taking part in the drills, according to Russia's defense minister.
Assault groups practised infiltrating along an underground water route to reach a mock enemy stronghold as part of the Center-2026 military drills, Russia's defence ministry said.
The system is designed for high-precision destruction of stationary and moving targets at a range of up to 20 kilometres, the Russian Defense Ministry said.
Russian President Vladimir Putin watched the Center-2026 drills, which are designed to sharpen the skills of command staff managing troop groupings, Russian state media reported.
The Russian president linked the exercise to the Interaction-2026 command-and-staff drills held under the Collective Security Treaty Organization framework.
The Russian president said new weapons and vehicles developed through combat experience are being used during the Center-2026 exercises.
The Russian president visited a training ground in the Chelyabinsk region as part of the large-scale Center-2026 strategic command-and-staff exercises.