Over the past 18 months of the COVID-19 pandemic, it has become clear that US supply chains have firmly established themselves as an issue of both economic security and national security. Late night calls in search of masks for our nurses, hand sanitizer for our citizens, and microchips for our automakers, laid bare these vulnerabilities in the commercial sector. That searing experience put new focus on defense supply chains – meaning the international networks that provide the goods and services needed to deliver finished products to the Department of Defense – the defense industrial base, and the ways that our defense supply chains were prepared to respond to supply shocks.