There was “blowback” from the intra-Republican Party coup d’état of April 14, 1865. (Blowback are unintended consequences of a covert operation that are suffered by the aggressor.) (Background: Blowback From Intra-Party Coup d’état, Ersjdamoo’s Blog, July 17, 2015.)
The blowback from the assassination of President Abraham Lincoln included harsh Reconstruction policies (Lincoln had wanted to go easy on the South) and the eventual birth of the so-called “Federal Reserve” in 1913.
Another of the blowback of the Lincoln assassination was a shift in how Native Americans (“Indians”) were dealt with. Gideon Welles, Secretary of the Navy under Presidents Lincoln and Andrew Johnson, gives us a peek into the shift in his private diary entry of January 29, 1867. “The Army desires to get possession of the Indian Bureau,” he wrote, “and the Interior Department is not disposed to relinquish it.” 
The Radical Republican faction of the then-fledgling Republican Party had gained the upper hand, consequent to the Lincoln assassination. In what President Andrew Johnson derided as a “French Directory” were nine representatives and six senators, most of them Radicals hand-picked by Congressman Thaddeus Stevens. There had been an extreme shift in government, from excessive decentralized leanings pushed for by the South, to extreme centralization, a dictatorship by committee.  In the middle of this government by committee, licking his paws like a sly cat, was Edwin Stanton, Secretary of War. He, according to Gideon Welles, professed to be indifferent about Indian affairs, yet really was like the cat who swallowed the canary. Stanton manipulated General Ulysses S. Grant and other military men into pushing for a shift of control over the Indian Bureau into the hands of the War Department. 
“It is a great mistake to change good Indian agents, if any there are,” confided Welles to his diary on January 29, 1867. “Political party adventurers and speculators, without conscience or principles, seek these positions to enrich and elevate themselves at the expense of the poor Indians. The old, single-hearted agents studied the character of the Indian, studied his habits, and interested themselves in his welfare. Military men are to a great extent natural enemies of the Indian… They are sojourners, not residents, and do not, like old and faithful agents, become identified with any Indian policy.” 
Ely S. Parker, a Seneca Indian who served as adjutant to General Ulysses S. Grant, wrote to Grant on January 25, 1867 about how “all matters of differences between the United States and the various Indian tribes” were to be settled. First there would be “retransfer of the Indian bureau from the Interior Department back to the War Department…” 
In 1869, the new President, Ulysses S. Grant, appointed Ely S. Parker as Commissioner of Indian Affairs. “Parker became the chief architect of President Grant’s Peace Policy in relation to the Native Americans in the West. Under his leadership, the number of military actions against Indians were reduced in the west.” But then, in 1871, Parker resigned from office. 
By 1876, General George Armstrong Custer and his forces had been decimated at the Battle of Little Bighorn (also known as the Battle of the Greasy Grass). But the Indians had only won the battle yet lost the war. The widespread public reaction was of horror and anger. “Crazy Horse’s surprising victory at Little Bighorn served only to stoke the U.S. Army’s fire to round up the Indians.” 
What is considered to have been the last stand of Indian military resistance took place in 1890, at Wounded Knee, South Dakota.
Had Abraham Lincoln not been killed; had he completed his second term of office; had he been allowed to kindly “bind up the nation’s wounds”, then it is less likely that management of Indian affairs would have been transferred from the Interior Department to the War Department. A physician rather than a warrior might have been dealing with the Indians. So you can see how blowback from the April 14, 1865 coup d’état altered what might have been.
The extremely centralized “French Directory” in Washington, DC made it much easier for monied interests to do one-stop shopping. Instead of having to go to 50 different States to make their purchases, a convenience store allowed capital to purchase their items from a single central location. In 1922 Secretary of the Interior Albert Bacon Fall ruled that Indian reservations which were created by Presidential Executive Order (as opposed to those created by treaty) were open to oil exploration. In 1923 the federal government unilaterally replaced the traditional Navajo council of elders with a Grand Council composed of government-selected individuals. The puppet Navajo government signed leasing permits with oil companies.  Later, during World War II, uranium was discovered all over the Navajo homeland in northeastern Arizona. The need for uranium was top-secret at the time, so the Manhattan Project formed a front company which they called the Union Mines Development Corporation. People working for Union Carbide helped form this front company for the government. A problem was that no one told the Indians that the “leetso” (yellow dirt) was extremely dangerous. And so, after the Second World War, when federal inspectors allowed Union Mines Development Corporation and other front companies to get away without cleaning up the detritus, the practical Indians decided to use the leftover debris to make bricks. The Navajo actually built their homes out of this radioactive dust. 
In 1951, a “coal rush” began on Navajo Nation. After legalisms were parsed and pruned, in 1967 Peabody Coal gained the right to mine the area. John Boyden, appointed by the Bureau of Indian Affairs as a land claims attorney for the Hopi, negotiated the leases. But Boyden also worked for Peabody Coal! Boyden requested Congress to partition a “Joint-Use area” into separate Dineh and Hopi areas. “The 1974 Navajo-Hopi Settlement Act was pushed through Congress by a group representing the coal-fired power industry, which believed their industry would benefit by having the U.S. government finance the eviction of all the people living in an area larger than the state of Rhode Island.” Senator John McCain authored this “relocation” bill. 
What is with this guy McCain? Did his mind become unhinged due to the great suffering he endured as a prisoner of war in Vietnam? It is feared that Senator McCain has got a screw loose. How else to explain how, in the midst of further suffering inflicted upon Navajo Nation due to the Gold King Mine spill of August 5, 2015, John McCain arrived at Navajo Nation with an offer of glass beads, in the form of a Navajo Code Talkers Museum, as a trade for the new damages. Furious Indians, for the moment anyway, appear to have rejected the McCain glass beads trade offer.
Blowback from the Abraham Lincoln assassination flowed down into the sacred San Juan River of Navajo Nation. John McCain came to trade glass beads as compensation. Elsewhere, “Federal Reserve” blowback now finds us on the precipice of economic disaster. One-stop shopping in Washington, DC though will serve to allow the election of puppets favorable to cosmetic band-aids. These may help continuance of “business as usual.” Unless, that is, people can not lose their minds in the face of an onslaught of “Citizens United” propaganda.
——- Sources ——-
 Diary of Gideon Welles, by Gideon Welles. Volume III, January 1, 1867 – June 6, 1869. Published by Forgotten Books, 2012. Originally published 1911.
 “Resistance of Andrew Johnson”, Ersjdamoo’s Blog, July 24, 2015. https://ersjdamoo.wordpress.com/2015/07/24/resistance-of-andrew-johnson/
 “Ely Parker: Report on Indian Affairs to the War Department”, 1867.
 “Ely S. Parker”, Wikipedia, August 20, 2015.
 American Heritage History of the United States, by Douglas Brinkley. Kindle e-book edition.
 The Navajo and Oil in the 1920s”, by Ojibwa. Native American Netroots, February 14, 2012. http://nativeamericannetroots.net/diary/1257
 “‘Yellow Dirt’: The Legacy of Navajo Uranium Mines”, interview of Judy Pasternak, author of Yellow Dirt: An American Story of a Poisoned Land and a People Betrayed. Interview conducted by Ira Flatow. National Public Radio (NPR), October 22, 2010. http://www.npr.org/templates/story/story.php?storyId=130754093
 “Short History of Big Mountain – Black Mesa”, http://www.aics.org/BM/bm.html