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.