For the first time in more than 100 years the <a href="https://en.wikipedia.org/wiki/Confederated_Tribes_of_the_Umatilla_Indian_Reservation" id="mwAUo" rel="mw:WikiLink" title="Confederated Tribes of the Umatilla Indian Reservation">Umatilla</a>, an <a class="mw-redirect" href="https://en.wikipedia.org/wiki/American_Indian_tribe" id="mwAUs" rel="mw:WikiLink" title="American Indian tribe">American Indian tribe</a>, are able to hunt and harvest a <a href="https://en.wikipedia.org/wiki/Bison" id="mwAUw" rel="mw:WikiLink" title="Bison">bison</a> just outside <a href="https://en.wikipedia.org/wiki/Yellowstone_National_Park" id="mwAU0" rel="mw:WikiLink" title="Yellowstone National Park">Yellowstone National Park</a>, restoring a centuries-old tradition guaranteed by a treaty signed in 1855.