Gall, the nickname of Pizi (1840?–1895), a Sioux Indian chief. He was born in South Dakota, a member of the Hunkpapa Sioux. He was given his nickname when as a hungry orphan he tried to eat the gall bladder of an animal for nourishment. As a young warrior, he was adopted as a brother by Sitting Bull. Gall was one of the important leaders in the Battle of the Little Bighorn (1876). In 1881, after quarreling with Sitting Bull, he surrendered to U.S. Army troops and settled as a farmer on the Standing Rock reservation. Gall came to be highly regarded by white officials for his wisdom and honesty.