VIDEO: 147 years ago, two deadly fires in the Midwest destroyed thousands of homes and businesses. But no other fire compares to the Peshtigo fire which killed at least 1,200 people - and is the deadliest in U.S. history. The Great Chicago fire blazed it's way across the Windy City the same day a forest fire ignited in Peshtigo. 300 people died in Chicago over a two day period. But there's one special building along the bay that did not burn despite the flames. The town of Peshtigo remembers the fire of 1871 even though no one alive now was around to experience it. A cemetery bears the markers and graves of those who survived the fire including a mass grave of 350 bodies that could not be identified. The town had no way to prepare for what was coming.