U.S Marine Corps Staff Sgt. Eric Potter, the enlisted conductor for the Quantico Marine Band assigned to Special Purpose Marine Air-Ground Task Force-250, leads the band in the opening ceremony during Marine Week Chicago, July 10, 2025. Throughout 2025, Marines across the globe will celebrate the 250th birthday of the Corps, commemorating service, sacrifice, and priding themselves on living ‘Semper Fidelis’ or ‘Always Faithful’ to their nation and to each other. (U.S. Marine Corps photo by Lance Cpl. Elijua Guel)