When Nathaniel Hapgood headed West in 1873 to stake a homestead claim in the Arizona Territory, he wagered it would take backbreaking labor to carve out a living -- nothing his Yankee know-how couldn't handle. But nothing in his New England upbringing prepared Nathaniel for Don Ignacio Olivera, who flew the Mexican flag over his hacienda and had his own private army to protect the vast lands his family had held for over one hundred years.