The U.S. on Monday announced almost $5.9 billion in military and economic aid for Ukraine, some of the final funds to be disbursed under President Joe Biden before an expected shift in support by incoming President-elect Donald Trump.

The military aid includes $1.25 billion in so-called Presidential Drawdown Authority, which pulls weapons and ammunition from U.S. stockpiles, and the final $1.22 billion from the Ukraine Security Assistance Initiative, Biden said in a statement. The aid includes air defense, artillery and ¡°other critical weapons systems,¡± he said.

Separately, the Treasury Department announced the last $3.4 billion disbursement in direct budget support under last year¡¯s Ukraine Security Supplemental Appropriations Act.

¡°I¡¯ve directed my Administration to continue surging as much assistance to Ukraine as quickly as possible ¡ª including drawing down older U.S. equipment for Ukraine, rapidly delivering it to the battlefield and then revitalizing the U.S. defense industrial base to modernize and replenish our stockpiles with new weapons,¡± Biden said in the statement.

Trump has pledged to swiftly end the war in Ukraine once he takes office Jan. 20, saying he would be willing to both ramp up aid to Kyiv or end it completely to force both sides toward a settlement. Last week, Russia dismissed Trump¡¯s call for an immediate ceasefire, with the future of Ukraine¡¯s relationship with NATO as a major sticking point.

Treasury Secretary Janet Yellen said the economic assistance, coordinated with the U.S. Agency for International Development and Department of State, will help maintain ¡°critical government services¡± as Russia intensifies attacks on civilian and critical infrastructure.

Military equipment from Pentagon inventories provided through the drawdown authority includes air-defense missiles, anti-tank weapons, and munitions for rocket systems and artillery.

The Defense Department said in an email that Biden still has access to about $4.35 billion in drawdown authority, but officials have previously warned that withdrawing heavily from U.S. stockpiles by the end of this term risks undermining U.S. readiness. Whatever remains of the PDA after Biden leaves office will be available if Trump chooses to use it, it said.

The separate security assistance funds will be used by Ukraine for long-term weapons contracts from U.S. firms. The package announced Monday includes air defenses, air-to-ground munitions and drones, the Pentagon said. The U.S. has provided more than $65 billion in military aid to Ukraine since Russia¡¯s February 2022 invasion.

Ukraine¡¯s military is struggling to fend off Russian advances in its east, and U.S. officials said last week that Kyiv¡¯s forces have lost about half the territory seized in Russia¡¯s Kursk region and may lose the rest in a matter of months.