As the United States’ war with Iran stretches into its sixth month, concerns over a depleted weapons arsenal, rising casualties and economic consequences have mounted.

President Trump has waved off those worries, even as he seeks a diplomatic solution to end the fighting and polls show Americans growing frustrated with the war. Instead, he has characterized the war in Ukraine as a greater drain on military resources, defended the death toll by comparing it with previous military engagements and celebrated single-day drops in oil prices.

Here’s a fact-check of some of his recent claims.

What Mr. Trump Said

“We have a lot of ammunition, different types. You know, Biden gave a lot to Ukraine and so we’re building that up, but we have a lot. We have a lot of the midlevel stuff, too; I mean, more than we could ever use, no matter what. But we have a lot. I’d like to have more, to be honest, but so much was given to Ukraine by Biden.”

— in remarks on Monday

This is misleading. The New York Times and other news outlets have reported that the Iran war has drained the United States’ arsenal of munitions. But Mr. Trump dismissed those concerns, blaming the Biden administration’s military aid to Ukraine instead. The president has a point that the Biden administration sent vast amounts of equipment and munitions to Ukraine, reducing stockpile levels. But those transfers played just a small role in the current issues with the Pentagon’s arsenal, because the military uses different weapons in the war with Iran.

Exact figures for stockpiles and weapons used are not publicly disclosed. But according to a Pentagon fact sheet from January 2025, the Biden administration transferred more than 100 types of equipment to Ukraine since Russia invaded the country in February 2022. The vast majority of that equipment was related to ground combat and not critical to Mr. Trump’s war in Iran, said Mark F. Cancian, a retired Marine Corps colonel and expert in war funding and procurement at the Center for Strategic and International Studies, a Washington think tank.

For example, the Biden administration provided Ukraine with thousands of armored vehicles, trucks and tanks; anti-tank weapons like Javelin and TOW missiles; mortar systems, artillery and millions of rounds of ammunition.