U kraine launched one of the biggest drone attacks on the Moscow-annexed Crimean Peninsula since the full-scale war that started with Russia’s invasion 21 months ago, Russian officials have said.

Ukraine’s military said Monday that Russia attacked Kyiv with eight ballistic missiles overnight in the latest wave of aerial assaults targeting the Ukrainian capital. The Ukrainian air force said air defenses shot down all eight of the missiles.

The Ukrainian leader will be appealing for more military support from the United States as an emboldened Russia steps up its attacks on his country.