Anything about US Military History? Do you have any interests that would narrow this? A particular time period, perhaps? Or maybe whether you're more interested in technological developments, battle tactics, strategies, consequences (political, economic, social, etc), or biographies of generals or important figures.
Military History can be a broad topic, especially when you get into modern history. If you want something relatively obscure, avoid World War II (and probably Vietnam) like the plague. Or, if you wanted to, you could pick something obscure in an obvious conquest (like the American reconquest of islands off of Alaska, perhaps a comparative paper to places like Iwo Jima and basically how our actions were a training ground for the later battle).
I have a history professor who likes to categorize all history students into warriors and non-warriors. There are people who are interested in battles, who fought, the tactics they used, etc. There are other people who have no interest in battles and wars and are more interested in intellectual history or social history. I tend to fall somewhere in the middle. That means I might have some ability to help, although my interest in wars tend to be the peripheries of them (minute details leading up to the war, general picture for the war, minute details of the consequences). I also haven't taken a US history class in a long time, so my knowledge of details could be fuzzy. Either way, I'll try to help if you can narrow it down.