Pentagon and industry officials acknowledged they are still figuring out how to arm Ukraine in their first public comments on the issue.

According to Pentagon budget chief Mike McCord, high-end conflicts consume a lot of munitions and weaponry. However, they have yet to determine where the supply chains are limited.

The United States has “not been in a position where we’ve gotten only a few days of some critical ammunition left,” McCord said, “but we are now supporting a partner who is.”

Senior Pentagon and business officials insist that efforts are finally picking up to supplant the weapons that the United States and its allies have sent to Ukraine, depleting stockpiles that are deemed crucial to intimidating China or other possible adversaries for years to come.