The first expansion of the territory occurred on October 28, 1878, when President Rutherford Hayes signed an executive order pushing the reservation boundary 20 miles to the west. Further additions followed throughout the late 19th and early 20th century (see map). Most of these additions were achieved through executive orders, some of which were confirmed by acts of Congress; for example, President Theodore Roosevelt's executive order to add the region around Aneth, Utah in 1905 was confirmed by Congress in 1933.