 He needed to fend off challenges from rivals within his village and also find success in dealings with United States government officials.The March 4, 1829, death of Tatanka Mani (Walking Buffalo), the widely respected Mdewakanton warrior, left a vacuum in the leadership of his band.Tatanka Mani, also known as Red Wing, was renowned for his bravery and was thought to be able to see the future through dreams.