This comes after months of warnings that there were no available funds for additional aid. The new funding became possible due to savings made in weapons contracts, according to officials.

Sullivan highlighted the urgency of the situation, stating that Ukraine lacked sufficient ammunition to defend itself against Russian aggression. He stressed that the lack of ammunition was costing Ukrainian forces valuable terrain and lives. Additionally, he emphasized that the security of the United States and the NATO alliance was at stake.

The aid package, as explained by Pentagon spokesman Maj. Gen. Pat Ryder, will include Stinger anti-aircraft missiles, ammunition for HIMARS, 155 millimeter and 105 millimeter artillery rounds, AT4 anti-armor systems, small arms ammunition, demolitions, munitions for obstacle clearing, spare parts, maintenance, and other equipment.

It was clarified that the Defense Department managed to allocate funds for Ukraine through savings in its budget. These savings were achieved through negotiations and bundling of funding across various areas. However, officials cautioned against considering this as a sustainable long-term solution, as it was a one-time opportunity.

The newly announced package will only provide enough ammunition for Ukraine for a few weeks, according to Sullivan. He stressed that it falls far short of meeting Ukraine's battlefield needs and should not deter the passage of the bipartisan national security bill, which Republicans in the House have yet to bring up for a vote.

This is not the first time unexpected sources of funding for Ukraine have been announced by the Pentagon. Last year, an accounting error led to overvaluation of aid provided to Ukraine by $6.2 billion, which extended the duration of military assistance to Ukraine.

Without support and weapons supplies from the United States, Ukraine has faced setbacks in its conflict with Russia. Last month, Russian forces claimed Avdiivka in eastern Ukraine after a prolonged assault. The Biden administration has been urging the House of Representatives to act on the $60 billion supplemental bill, which has already passed the Senate. However, the Republican leadership in the House has thus far refused to allow a vote on the bill, prompting the Pentagon to find alternative ways to provide aid to Ukraine.

The Biden administration's announcement of the $300 million military aid package showcases its commitment to supporting Ukraine in its fight against Russian aggression. However, the urgent need for sustained assistance remains, as Ukraine continues to strive for security and stability in the face of ongoing challenges.