The onset of the Russian invasion of Ukraine was widely medialized by both mainstream as well as alternative media channels, including websites spreading disinformation. Following the start of the Russian aggression, many unprecedented steps have been taken to fight the spread of disinformation, which has become a top concern for policy decision-makers as well as the public. Therefore, PSSI has analyzed the onset of the Russian invasion of Ukraine through the eyes of one of the most well-known pro-Kremlin media in the Czech Republic: Sputnik CZ.