Considered the most powerful nation on Earth today, the United States maintains a large military, as well as having the largest economy behind California. Although extremely rich, it does have problems; millions of immigrants have crossed or tried to cross the border with the Confederate States of America to escape the slavery many face in the South. It also is faced with the continued issue of Vermont, which has lead it into three wars with New England, the most recent being the May to July 2005 'Lake Champlain War'.