What is western theater?

Greek theatre, most developed in Athens, is the root of the Western tradition; theatre is in origin a Greek word ... Athenian tragedy-the oldest surviving form of tragedy-is a type of dance-drama that formed an important part of the theatrical culture of the city-state.

The Western Theater of the American Civil War encompassed major military operations in the states of Alabama, Georgia, Florida, Mississippi, North Carolina, Kentucky, South Carolina and Tennessee, as well as Louisiana east of the Mississippi River.