<Tr> <Td> 1865 </Td> <Td> October 18 </Td> <Td> </Td> <Td> Treaty with the Comanche and Kiowa </Td> <Td> 14 Stat. 717 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 1865 </Td> <Td> October 19 </Td> <Td> </Td> <Td> Treaty with the Dakota or Sioux, Two - Kettle Band </Td> <Td> 14 Stat. 723 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 1865 </Td> <Td> October 19 </Td> <Td> </Td> <Td> Treaty with the Blackfeet Sioux </Td> <Td> 14 Stat. 727 </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 1865 </Td> <Td> October 20 </Td> <Td> </Td> <Td> Treaty with the Dakota or Sioux, Sans Arc Band </Td> <Td> 14 Stat. 731 </Td> <Td> </Td> <Td> </Td> </Tr>

Why did the united states sign a treaty with spain