Bertrand

The Bertrand was a steamboat which sank on April 1, 1865, while carrying cargo up the Missouri River to Virginia City, Montana Territory, after hitting a snag in the river north of Omaha, Nebraska. Half of its cargo was recovered during an excavation in 1968, more than 100 years later. Today, the artifacts are displayed in a museum at the DeSoto National Wildlife Refuge near Missouri Valley, Iowa. The display makes up the largest intact collection of Civil War-era artifacts in the United States and is an invaluable time capsule of everyday life during that period.

Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).