TODAY IN BIGFOOT HISTORY! Oglala Sioux leader Red Leaf claims to be protected by the spirit of the chiye-tanka (Sioux word for Bigfoot). Red Leaf’s personal relationship with the vicious chiye-tanka allowed him to attack the whites from any distance and kill them with only his stony stare. Red Leaf’s claims were witnessed by hundreds of Sioux. The belief in his alliance and his protection inspired his tribe at the battle of Fort Laramie in 1854.