On this day, June 15, 1877, The US Army under General Oliver Otis Howard began to pursue some 800 Nez Perce. The Nez Perce had been ordered to leave the Valley of the Winding Waters (Wallowa Valley) in Oregon.

Also on this day, June 15, 2017, Nike announced several changes to its business structure including a cut of about 1,400 jobs and reduction of the number of sneaker styles it offers by a quarter.

Also on this day, June 15, 1846 The United States and Britain signed a treaty settling a boundary dispute between Canada and the United States in the Pacific Northwest at the 49th parallel. Great Britain and the U.S. agreed on a joint occupation of Oregon Territory. President Polk agreed to a compromise border along the 49th parallel. The debate over the northwestern border of the United States. The campaign slogan "54-40 or fight" referred to the debate over the northwestern border of the United States. The slogan "54-40 or fight" refers to the north latitude degree and minute where many Americans wanted to place the border between the U.S. and then Great Britain in the Pacific Northwest.