President Joe Biden made his case before the UN General Assembly on Tuesday that the world must remain united in defending Ukraine against Russian aggression, warning that no nation can be secure if “we allow Ukraine to be carved up” as he tries to rally support for Kyiv’s effort to repel a nearly 19-month-old Russian invasion that has no end in sight.

The US president called on world leaders to not let support for Ukraine diminish, arguing that Russia is counting on countries to grow tired of prolonged conflict in Kyiv which will “allow it to brutalize Ukraine without consequence.” Russia alone is standing in the way of a resolution, Biden argued, saying that Moscow’s price for peace was “Ukraine’s capitulation, Ukraine’s territory and Ukraine’s children.”