The United States is providing Ukraine with $500 million in additional weapons and equipment from its existing military stockpiles, in what officials told VOA will be the final military aid package before President Joe Biden leaves office.

The officials were speaking to VOA on condition of anonymity ahead of the announcement, which is expected Thursday when U.S. Secretary of Defense Lloyd Austin's hosts the Ukraine Defense Contact Group in Ramstein, Germany, for the last time.

"Our focus will be on maintaining momentum, delivering results, and sending a clear message: The international community stands resolute in its support for Ukraine," Austin said.

Ukrainian President Volodymyr Zelenskyy announced that he will join Austin at the 25th meeting of the group, which comprises about 50 nations that came together under Austin's leadership to coordinate security assistance following Russia's invasion of Ukraine in February 2022.

As Ukrainians fight to survive, that common cause to support their fight is shrouded in uncertainty. President-elect Donald Trump has not indicated whether he will continue America's leadership of the group when President Biden leaves office on Jan. 20, and current administration officials and defense analysts warn that could prove catastrophic for Kyiv.

There is still $3.8 billion in approved funds for Ukraine that was passed by Congress in April, but the Pentagon says it can't send that aid at this time because it needs additional funds from Congress to restock its own supplies.

Officials said the administration hoped the latest aid package, along with other commitments from the Ukraine Defense Contact Group, could put Kyiv in a stronger negotiating position. They also told reporters that at least 80% of the American weapons and equipment promised to Kyiv from U.S. stockpiles would reach Ukraine before Biden left office. One notable exception, a senior defense official said, was a group of military vehicles that were still being refurbished to be used on the battlefield.