Complex sentence: American War, Captain John C. Frémont camped on the Richardson ranch property It was a major loss for the Richardsons and was the probable reason for the ultimate demise of the Rancho.
Split into simpler sentences: American War, Captain John C. Frémont camped on the Richardson ranch property. This was a major loss for the Richardsons and was the probable reason for the ultimate demise of the Rancho.