The Battle of Platte Bridge, also called the Battle of Platte Bridge Station, on July 26, 1865 was the culmination of a summer offensive by the Lakota Sioux and Cheyenne Indians against the United States army. In May and June the Indians raided army outposts and stagecoach stations over a wide swath of Wyoming and Montana. In July, they assembled a large army, estimated by Cheyenne warrior George Bent to number 3,000 warriors, and descended upon Platte Bridge. The bridge, across the North Platte River near present-day Casper, Wyoming, was guarded by 120 soldiers. In an engagement near the bridge, and another against a wagon train guarded by 28 soldiers a few miles away, the Indians killed 29 soldiers while suffering at least eight dead.