Ukrainian President Volodymyr Zelensky delivered a somber reply overnight to Vladimir Putin’s massive rally in a Moscow stadium, accusing the Russian leader of deliberately trying to create a “humanitarian catastrophe” and warning the war on his nation will plague Russia for generations.

Zelensky’s address came the day after Putin sought to garner support for Russia’s army as it enters the fourth week of what he calls a “special military operation” and what most of the world calls an illegal invasion of a sovereign nation. The embattled Ukrainian leader, speaking from outside his offices in Kyiv, noted an estimated 200,000 Russians attended Putin’s rally and seemed to address them directly when he referred to his nation’s estimates of the price Russia has already paid for its war.