The 3rd Armored Brigade Combat Team of the US 1st Cavalry Division was defeated by a Ukrainian drone unit in the 'Combined Resolve' joint exercise held in Germany. The Ukrainian drone unit used reconnaissance and attack drones to defeat the US armored unit, revealing the vulnerability of US forces to drone attacks. While the United States is working on developing drone technology and formulating countermeasures, it is analyzed that practical experience is lacking. Ukraine has demonstrated world-class drone operation capabilities through its war with Russia, and the United States is striving to improve its anti-drone operations capability with the help of Ukraine.