The American System was really only a big deal in the 1820-30's. Antebellum is definitely before the civil war:
antebellum - Definition from the Merriam-Webster Online Dictionary
By the way, was the second to last one, the one about US involvment in Cambodia, the choice with Khmer Rogue in it? Thats what I guessed.
Yea I put the Iriquois and loyalty, but the Powhatan could also have worked..