( CNN) Russia kicked off what it says are its largest war games since the fall of the Soviet Union on Tuesday, as it hosted a bilateral meeting between President Vladimir Putin and Chinese leader Xi Jinping in the far eastern city of Vladivostok.

At least 300,000 Russian troops, 36,000 vehicles and 1,000 aircraft are taking part in the Vostok 2018 exerts, according to the Russian Ministry of Defense.

They'll be joined by thousands of troops from China and Mongolia, which the Chinese Defense Ministry insisted wasn't “directed against any third party” and would concentrate purely on “defenses, firepower strikes and counterattack.”