As the U.S. grapples with a Senate Intelligence Committee report detailing Russia’s influence on social media, Moscow is playing games with more than memes in Japan. On islands that have been disputed territory since World War II, Russia said Monday that it had already built barracks and would build more military facilities even while talks with Japan are ongoing.

The islands, known in Japan as the Northern Territories and to Russia as the Southern Kurils, are part of a key territorial dispute that has meant that even decades after the war, Japan and Russia have not yet singed a peace treaty.