Without much fanfare, Taiwan may have become one of the Ukraine air force’s biggest boosters. According to former Pentagon official Tony Hu, Taiwan has donated its surplus HAWK surface-to-air missile batteries to the Ukrainian air force.

Hu’s comments to YouTube channel RJ War Room seem to confirm reporting from 2023 hinting at a U.S.-brokered air-defense deal between Taiwan and Ukraine. The Taiwanese MIM-23 Homing All-the-Way Killer missiles, plus their launchers and radars, would complement additional HAWKs donated to Ukraine by the United States and Spain.

In all, Ukraine could deploy as many as 15 of the Raytheon-made HAWK batteries, each with at least six three-missile launchers and associated radars. The Ukrainian air force went to war in February 2022 with around 50 SAM batteries—S-300s and other ex-Soviet models, mostly—and has since swapped out many of the surviving Soviet batteries for more modern Western systems, including American-made Patriots.