This paper provides an overview of how the Russia's war of aggression against Ukraine illustrates immediate threats posed by disinformation, as well as governance responses to countering it. It focuses on disinformation in relation to the Russian armed aggression of Ukraine, including actors, tools and narratives used to justify the invasion and maintain support for the war. The paper also identifies government efforts to counter the spread of disinformation, including efforts to ensure the spread of accurate content, promote international co-operation, and support civil society and media actors to build resilience to the spread of false and misleading content.