You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: WHAT'S THE MARTYR WITH YOU? 
Clue: This man whose feast day is Dec. 26 was the 1st Christian martyr; his story is told in the Acts of the Apostles
saint stephen

Category: THE CIVIL WAR 
Clue: A century before the U.S.S. Nautilus, the Confederacy had 2 of these new ships, the Pioneer  & the Hunley
submarines

Category: COLONIAL AMERICA 
Clue: Rather than towns & villages, early Maryland settlers built these medieval estates

manors