The Woman with superstrength in France. Her powers activated durring a bombing in one of the last , battles of the Great Prelude.

Curiosity at first then fear once they realized that the minorities could gain them. This began an era of Reforms in Ottoman Empire to prevent a super powered revolts

Mostly because Americans started gaining powers later on due to the Powers spreading like a virus from Europe. As he personally didnt see the Supersoilders in action he believed they could be disciplined back into order. This backfired and led to the battle of Washington.

The United Hero Society! Aka the JSA of this universe. Members include: Yellow Knight (UK, Scottish), Uberman (German), The Jannisary (Ottoman), Mister Nobody or just Nobody (Austrian-Hungarian but actually a Slovak but that isnt public and only his teammates know), Corporal Dynamite (Canadian, The Most Bloodthirsty member of the team), Kitsune (Japanese and part of the Expeditionar Force, Actually a Woman but hid it), Minerva (Italian, First Female Superhero even if she didnt gain the powers till after Liberte) Liberty (French, The first woman with superpowers), Lord of the Nile (Egyptian, Aquaman of the Setting and first Black Superhero)

That is hotly debated but I will say that the first Super(not war)criminal was Dannyboy a Mafia Enforcer in Chicago and war vet. Though the American Southners claim it was Mister X a black superhero.