The Battle of Birch Coulee occurred September 2, 1862 during the Dakota War of 1862. After the Battle of Fort Ridgely and the Battle of New Ulm, Colonel Henry Hastings Sibley was planning to retaliate against the Sioux and to obtain the release of the settlers they were holding captive. While Sibley was training soldiers and attempting to organize supplies, he was reminded that the bodies of many settlers killed by the Indians still remained unburied on the battlefields.