![A portion of the Dakota Access Pipeline under construction.](/sites/default/files/styles/large/public/SB%202%20Dakota%20Access%20Pipe%20Line.jpg?itok=fjNE_L3p)
Dakota Access Pipeline
![North Dakota police sprayed unarmed protesters with pepper spray in November 2016.](/sites/default/files/styles/large/public/SB%205%20Police%20Pepper%20Srpay%20Protesters.jpg?itok=vyvC0hVo)
Police Pepper Spray Protesters
![Council at Medicine Lodge Creek.](/sites/default/files/styles/large/public/SB%206%20Council%20at%20Medicine%20Lodge%20Creek.png?itok=ZsOPXQbD)
Council at Medicine Lodge Creek
![An 1834 depiction of members of the Choctaw tribe performing the Eagle dance.](/sites/default/files/styles/large/public/SB%207%20Eagle%20Tail%20Dance.jpg?itok=8k0ZKF-z)
Eagle Tail Dance
![The flag of the American Indian Movement.](/sites/default/files/styles/large/public/SB%208%20Flag%20of%20AIM.png?itok=Pb2Bie1f)
Flag of the American Indian Movement
![William Weatherford surrendering to future-president Andrew Jackson.](/sites/default/files/styles/large/public/SB%209%20Jackson%20and%20Wetherford.jpg?itok=mWpUuixb)
Andrew Jackson and William Weatherford
![A protester waving a flag reading 'Since 1492 One Blood.'](/sites/default/files/styles/large/public/SB%2010%20Since%201492%20One%20Blood.jpg?itok=h5a8r7as)
"Since 1492 One Blood"
![North Dakota Police on top of Turtle Hill.](/sites/default/files/styles/large/public/SB%2012%20Police%20Lookout%20Station.jpg?itok=z7G9m9Yi)
Police Lookout Station
![Oceti Sakowin Camp, or All Nations Camp, in Standing Rock.](/sites/default/files/styles/large/public/31015393134_eea66b96de_k.jpg?itok=bFDMda3A)
Oceti Sakowin Camp
![The signing of a peace treaty in 1642.](/sites/default/files/styles/large/public/3%20New%20Amsterdam%20Treaty.jpg?itok=M2_mk_f4)
New Amsterdam Treaty
![The United States and a coalition of Native American tribes signing the Treaty of Greenville in 1795.](/sites/default/files/styles/large/public/4%20Treaty%20of%20Greenville.jpg?itok=r7oL6z4d)
Treaty of Greenville
![The signing of a treaty in 1851 between the United States and the Sioux Indians.](/sites/default/files/styles/large/public/5%20Treaty%20of%20Traverse%20des%20Sioux.jpg?itok=wmK9D-rK)
Treaty of Traverse des Sioux
![A November 2016 march in San Francisco in solidarity with Standing Rock protesters.](/sites/default/files/styles/large/public/6%20Solidarity%20March.jpg?itok=tZ1PvWBf)
Solidarity March
![Peace of Westphalia.](/sites/default/files/styles/large/public/7%20Peace%20of%20Westphalia.jpg?itok=uyqvJHsB)
Peace of Westphalia
![A mural to the Trail of Tears in Oklahoma.](/sites/default/files/styles/large/public/10%20Trail%20of%20Tears.jpg?itok=Z3RxjFUj)
Trail of Tears Mural
![Members of the Native American Youth Council demonstrating against the Bureau of Indian Affairs.](/sites/default/files/styles/large/public/11%20BIA%20Protest%20.jpg?itok=1FY02Z0U)
Bureau of Indian Affairs Protest
![General William T. Sherman meeting with Indian Chiefs.](/sites/default/files/styles/large/public/12%20Fort%20Laramie%2C%20Wyoming.jpg?itok=h3fmGCJt)
Fort Laramie, Wyoming
![Apache children at the Carlisle boarding school in Pennsylvania.](/sites/default/files/styles/large/public/13%20Carlisle%20Boarding%20School.jpg?itok=fT-MIHTr)
Carlisle Indian Industrial School
![Fredericksburg Peace Pipe Statue.](/sites/default/files/styles/large/public/15%20Fredericksburg%20Peace%20Pipe%20Statue.jpg?itok=ckB4u_lW)
Fredericksburg Peace Pipe Statue
![Depiction of the signing of the Treaty of Greenville in 1795.](/sites/default/files/styles/large/public/18%20Treaty%20of%20Greenville%20Signing.jpg?itok=BBMVBsPs)
Treaty of Greenville Signing
![A poster from the U.S. Department of the Interior advertising the sale of 'Indian Land.'](/sites/default/files/styles/large/public/19%20Indian%20Land%20for%20Sale.jpg?itok=u4JPgVKu)
Indian Land for Sale
![Protesters in Standing Rock insisting that treaty rights and sacred ground be respected.](/sites/default/files/styles/large/public/22%20Standing%20Rock%20Protesters.jpg?itok=GWRIDpcn)
Standing Rock Protesters
![A 2013 commemoration of the Treaty of Canandaigua in Syracuse, New York.](/sites/default/files/styles/large/public/15%20Treaty%20of%20Canandaigua.jpg?itok=MTwaDZeV)
Treaty of Canandaigua Commemoration