The Shoshone are a Native American tribe with three large divisions: the Northern, the Western and the Eastern. The Northern Shoshone are concentrated in eastern Idaho, western Wyoming, and north-eastern Utah. The Eastern lived in Wyoming, northern Colorado and Montana. Conflict with the Blackfoot, Crow, Lakota, Cheyennes, and Arapahos pushed them south and westward after about 1750. The Western ranged from central Idaho, northwestern Utah, central Nevada, and in California about Death Valley and Panamint Valley. This group is sometimes called the Panamint. The Idaho groups of Western Shoshone were called Tukuaduka (sheep eaters), while the Nevada/Utah ones were called the Gosiute or Toi Ticutta (cattail eaters). Possibly the most famous member of the Shoshone tribe was Sacajawea who accompanied the Corps of Discovery with Meriwether Lewis and William Clark in their exploration of the Western United States. The estimated population of Northern and Western Shoshone was 4,500 in 1845. 3,650 Northern Shoshone and 1,201 Western Shoshone were counted in 1937 by the United States Bureau of Indian Affairs.