The Department of Defense is transferring $1.4 billion from the Ukraine Replacement Transfer Fund to replenish the Javelin anti-tank and Stinger anti-aircraft missiles that the United States has provided to the Ukrainian military.

The transfer of funds, which was reported by Inside Defense, includes roughly $1.1 billion to the Army ($809 million to procure additional Javelin missiles and $303 million for Stingers) while the Navy is receiving $370 million for Stingers, according to a document from the Pentagon comptroller.

"The reprogramming action provides funding for the replacement of defense articles from the stocks of the Department of Defense and for reimbursement for defense services of the Department of Defense and military education and training provided to the Government of Ukraine," the document read.

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"These actions are determined to be necessary in the national interest," it added. "This reprogramming action meets all administrative and legal requirements. and none of the items have been previously denied by the Congress."

The U.S. has provided Ukrainian forces with more than 1,400 Stinger anti-aircraft systems and 5,500 Javelin anti-armor systems, and those make up a portion of the nearly $4 billion of military assistance the U.S. has allocated. He recently urged Congress to pass a new $33 billion spending package, which includes more than $20 billion for weapons, ammunition, and other military assistance.

The U.S. has provided a third of its stockpile of Javelins and a quarter of its stockpile on anti-aircraft Stinger missiles, Sen. Roy Blunt (R-MO) said during a Tuesday hearing on Capitol Hill where Defense Secretary Lloyd Austin and Gen. Mark Milley, the chairman of the Joint Chiefs, were testifying, though Austin said they were above their minimum requirements despite the hits.

Pentagon spokesman John Kirby, when asked about Blunt's comments, said he was going to "refrain from talking about our inventory levels" during Thursday's briefing.

Biden visited a Lockheed Martin facility in Alabama earlier this week. Lockheed Martin and Raytheon Missiles and Defense manufacture the Javelin missiles together. The CEO of Raytheon, the defense contractor that produces Stinger missiles, revealed recently that the company would face difficulties in replenishing its stockpiles of the weapon.

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Javelins can hit targets up to 2.5 miles away, and the White House press office told reporters ahead of Tuesday's trip that the weapons have "been used very effectively by the Ukrainians to defend their country against the Russian invasion, including to win the Battle for Kyiv. The Ukrainian military has made extensive use of Javelins to damage Russian tanks and artillery throughout the conflict."

The president, in a speech at the plant, said: "As I said from the beginning, this fight is not going to be cheap, but caving to aggression would even be more costly. We either back the Ukrainian people to defend their country, or we stand by as Russia continues its atrocities and aggression."