Would the Spanish flu remain in America?

Would the Spanish flu remain confined to the United States without wartime troop camps?

Not necessarily. Its spread would differ, but crowded cities could still sustain a pandemic on a similar scale.

Removing American wartime training camps and mass troop movements changes the pandemic's circumstances without guaranteeing containment. Crowded cities remain capable of sustaining widespread transmission. The outbreak could therefore be just as large even if its routes and public response differ from the historical pandemic. Military mobilization was one condition affecting global spread, not its only possible cause.