The United States on Friday announced a fresh tranche of military aid for Ukraine, including ammunition, missiles, mines and artillery rounds as Russia presses its assault on the Kharkiv region.

Ukraine has been battling back in Kharkiv since May 10, when thousands of Moscow’s troops stormed the border, making their biggest territorial advances in 18 months.

“The United States is announcing today a significant new drawdown of weapons and equipment for Ukraine to support the brave Ukrainian people as they defend their country,” said Secretary of State Antony Blinken.

“This $275 million package, which is part of our efforts to help Ukraine repel Russia’s assault near Kharkiv, contains urgently needed capabilities.”