i am no expert on universitys but your probably right britain would be a good place to study, it is expensive (more so for foreginers) i doubt you will get much subsidys, the best for medieval history is caimbridge (as far is i know) but competition is fierce depending on how popular the course is (were talking straight A's) and you usually need a qualification in a foreign language as well as science english and maths (at at least GCSE Level) im not sure how american qalifications transfer though