The Sioux were retreating before General H.H. Sibley's 2000 men after defeats at Big Mound and Dead Buffalo Lake. To protect the retreat of the main body of women and children and their lodges, around 2000 Sioux warriors threw a blocking force around Sibley's troops near Stony Lake and then made an attack on his supply train about two hours after dawn. Cavalry, infantry, and artillery engaged the hostiles but casualties were light on both sides. The Sioux had, however, bought the time their families needed to cross the Missouri River. (By John Osborne)