President Biden announced the approval of an $800 million military assistance package bound for Ukraine on April 13. The package, which includes heavy artillery systems, artillery rounds, Javelin missiles, Switchblade drones, Mi-17 helicopters, and more, was approved in anticipation of a wider Russian assault in the eastern Donbas region of Ukraine.

“The Ukrainian military has used the weapons we are providing to devastating effect. As Russia prepares to intensify its attack in the Donbas region, the United States will continue to provide Ukraine with the capabilities to defend itself,” Biden said in a White House statement.

Biden made the announcement after a phone call with Ukrainian President Volodymyr Zelensky. The White House and its allies have been struggling with how to reinforce the Ukrainian defense without escalating it to a worldwide conflict, as shown with the rejected Polish proposal to provide MiG-29 fighter planes to Ukraine. Despite this, the US continues to be the primary and largest military backer of Ukraine.

In the first weeks of Putin’s invasion of Ukraine, the US and its allies relied on imposing economic sanctions on the Russian economy to pressure to halt its aggression. Along with this, allies were gradually incorporating shipments of weapons as Moscow remained unfazed by the sanctions.

“The steady supply of weapons the United States and its Allies and partners have provided to Ukraine has been critical in sustaining its fight against the Russian invasion. It has helped ensure that Putin failed in his initial war aims to conquer and control Ukraine,” Biden said.

Washington has now committed over $3.2 billion in defense assistance to Kyiv since February. This includes some $2.6 billion given during the early onset of the war.

The new support package comes as Russia shifts its offensive focus on the Donbas region. The Donbas region is where pro-Russian separatists hold territory, namely the so-called Donetsk and Luhansk People’s Republics, which the Russians recognized as independent states before the invasion.