From the introduction: Tombstone is set in North America from 1865 onwards. The American Civil War is over. The nation has been traumatised and scarred by war, but somehow life goes on. Society has changed, and new possibilities emerge. Railroads need building, the West needs taming, and gold needs mining. The transcontinental railroad is slowly being constructed, creeping across the continent from the East and West coasts. It finally meets near Salt Lake City, Utah. Mormon country.