That should have been
Fort McHenry
Thanks!
They added a star and a stripe for Vermont and Kentucky, but not for the states that entered the Union later (Tennessee, Ohio, and Louisiana). Then someone got the bright idea of reducing the number of stripes to 13 (as it had been originally) and just adding a star for each new state. But a flag with 15 stars and 13 stripes was never the official US flag.