The Indians had concealed large bands of warriors near the bridge and over the crest of the hills, possibly as many as a thousand Lakota, Cheyenne and Arapaho. Collins wheeled his detachment into two lines and charged the first group to emerge, only to find himself heavily outnumbered. He then ordered a retreat to the bridge through the Cheyenne to his rear as yet another force, this of Lakota, attempted to rush the bridge. The skirmish line at the bridge held the Lakota at bay with volley fire until 20 of the 26 troopers, all wounded to some extent, fought their way through. Five were killed, including Collins, who was wounded in the hip and shot in the forehead with an arrow while trying to aid a wounded soldier. The battle lasted only a few minutes, with Bent claiming that the Lakota and Cheyenne suffered only a few casualties.