The United States, 1847. A disparate group of young American soldiers are bound to join General Winfield Scott's campaign against Santa Anna at Veracruz during the Mexican-American War. They never arrive. Or rather... they arrive somewhere else. The untried, idealistic soldiers have been shipwrecked on a terrible, different Earth full of monsters and unimaginable enemies. Major Lewis Cayce, late of the 3rd US 'Flying' Artillery, must unite these men, for only together will they have any hope of survival.