Character Idea:

The British Army sent observers during the civil war. You were sent to observe but got swept up in a whirlwind romance with a southern bell, unfortunately your heart was really with the Union and against orders found yourself giving advice to and then eventually actively leading union troops. This all came to a head and your commanding officer cashiered you for exceeding your orders and teh brothers of your bell found out you were fighting for the union and planned a trap for you using your GF as bait. You showed up and fought it out with the brothers saved from an ambush by your GF warning you at the cost of her own life. Your commission stripped from you, your love dead, you head out for the frontier.