Swarm Aero’s Legion command-and-control software achieved operational validation during the U.S. Navy’s FLEX 2026 exercise in Key West, Florida, held 24–30 April 2026. Legion enabled a single operator to orchestrate seven heterogeneous air and sea platforms with dozens of sensors through a unified Single Pane of Glass interface, executing a full find-fix-track-target-engage-assess chain and achieving 100% live-fire target hits (3/3). This marks the first operational validation of a commercial C2 stack in a live-fire, adversarial scenario involving unmanned assets, moving beyond lab-based autonomy tests. The Navy is testing commercial C2 stacks to determine if autonomous mass-control claims survive contact with a real kill chain, specifically drug-boat interdiction. Vendor-reported metrics remain unverified by independent Navy testing.