"We don't have an issue with military exercises, we do it all the time," Kirby said when asked if the Defense Department is concerned about the Russia-China joint military drills. "They obviously decided they need to operate together, exercise together, and I think they should have to speak for that."
Kirby added that the United States will continue to improve its capabilities and work with its allies in the region.
Over the weekend, Moscow said that Russian and Chinese warships had conducted the first joint patrol in the Pacific Ocean, with the vessels traversing the international waters of the Tsugaru Strait in the Sea of Japan.
Tokyo said that the warships also sailed through the Osumi Strait and the Japanese military registered a helicopter taking off from and landing on the deck of a Chinese destroyer near the Danjo Islands. In response, the Japanese Air Self-Defense Force scrambled fighter jets.
In addition, Russia and China also held joint naval exercises from October 14-17 in the Sea of Japan. The crews worked out joint tactical maneuvering, anti-mine support of detachments, as well as conducted artillery fire at sea targets, among other things, according to the Russian military.