You know, I can't believe I've never featured this hero before:
Anyway, USA The Spirit Of Old Glory--yes, that's her name--has one of the more insane origins out there.
As an unnamed child, she watched Betsy Ross sew that famous flag...
No, wait, some mysterious robed figure (a monk? Never explained!) gives a prophecy:
Her powers were vague, even by Golden Age standards. She could fly, she was strong, anything she covered with that flag was invulnerable...
Oh, and the flag "drooped" whenever there was danger to America:
And heaven help you if you had a political rally that USA didn't approve of:
I'm not quite sure how she did that bit there...perhaps her flag operates in some way like Cloak's cloak? Does she use flags as doorways to alternate dimensions that allow her to travel swiftly to wherever there is a flag? Yes, I'm putting way too much thought into a silly Golden Age power.
Oh, and she has her "Torch Of Liberty," which can do pretty much anything she needed that story, including completely destroying a Nazi army that's been hiding in a cave on American soil:
USA The Spirit Of Old Glory never had a "real" identity, never even had a name besides USA. Once she posed as a woman working in a munitions factory, but that was just undercover work, not the traditional secret identity.
Insane quasi-mystical origin, baffling but colorful power-set, jingoistic to the point of nastiness...why DC never revived her is beyond me. Put her on Earth-X (or whatever they call that these days) as the mysterious anti-hero who occasionally teams up with the Freedom Fighters but often goes too far for their tastes...
Anyway, USA The Spirit Of Old Glory--the human/flag hybrid who beats up teachers and crushes armies single-handedly. She's out there in the public domain, just waiting...
From Feature Comics #42-#48 (1941)