Question: Poker Joe, was a warrior and subchief of the Nez Percé tribe of Native Americans who played a critical role during the flight of the Nez Percé during the Nez Percé War in which year, he was the chosen trail boss and guide of the Nez Percé people following the Battle of the Big Hole?

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Fort Nez Percés: Fort Nez Percés (or Fort Nez Percé, with or without the accent), later known as (Old) Fort Walla Walla, was a fortified fur trading post on the Columbia River on the territory of modern-day Wallula, Washington.  Despite being named after the Nez Perce people, the fort was in the traditional lands of the Walla Walla.  Founded in 1818 by the North-West Company, after 1821 it was run by the Hudson's Bay Company until its closure in 1857.

Nez Perce language: Nez Perce , also spelled Nez Percé or called Niimi'ipuutímt, is a Sahaptian language related to the several dialects of Sahaptin (note the spellings, "-ian" vs. "-in").  Nez Perce comes from the French word, "pierced nose," although Nez Perce (who call themeselves "Nimipu" meaning "the people") did not practice nose piercing.  This may have occurred as a result of confusion on behalf of the French, as it was surrounding tribes who practiced this act.  The Sahaptian sub-family is one of the branches of the Plateau Penutian family (which, in turn, may be related to a larger Penutian grouping).  It is spoken by the Nez Perce people of the Northwestern United States.

Poker Joe: Poker Joe (18??  - 1877) or Hototo, also known as "Lean Elk" or "Little Tobacco" was a warrior and subchief of the Nez Percé tribe of Native Americans who played a critical role during the flight of the Nez Percé during the Nez Percé War in 1877.  He was of half French Canadian and Nez Percé descent and was said to have received his nickname from his love of the game of poker.  Poker Joe was familiar with Montana and the routes through the Rocky Mountains to reach the Great Plains and guided the Nez Percé in their flight.  He spoke good English and served as an interpreter and adviser to Chief Joseph and other Nez Percé leaders.  He was the chosen trail boss and guide of the Nez Percé people following the Battle of the Big Hole, in which the Nez Percé won a costly victory against pursuing U.S. forces in southwest Montana.  He kept the Nez Percé ahead of the army for the following seven weeks.  He led the Nez Percé on a trek to the Missouri River, covering between 500 and 700 miles.

Nezperce, Idaho: Nezperce is a city in and the county seat of Lewis County, Idaho, United States.  The population was 466 at the 2010 census, down from 523 in 2000.  Nezperce is named for the local Nez Perce tribe of Native Americans.  ("Nezperce" derives from a corruption of French words "nez percé", literally "pierced nose.")  There is one school district, Nezperce School District #302.

James Jackson (Medal of Honor): James Jackson (November 21, 1833 – October 21, 1916) was an American officer in the U.S. Army during the mid- to late-19th century.  He was a captain with the 12th Iowa Volunteer Infantry Regiment during the American Civil War and with the 1st U.S. Cavalry in the Indian Wars.  While fighting the Nez Percé at Battle of Camas Meadows in 1877, he risked his life to recover the body of another soldier, preventing its mutilation by the enemy.  For this act, he received the Medal of Honor nearly 20 years later.

Big Hole National Battlefield: Big Hole National Battlefield preserves a Nez Perce War battlefield located in Montana, United States.  The Nez Percé fought a delaying action against the 7th Infantry Regiment (United States) here on August 9 and 10, 1877, during their failed attempt to escape to Canada.  This action, the Battle of the Big Hole, was the largest battle fought between the Nez Percé and U.S. Government forces in the five-month conflict known as the Nez Perce War.  In 1992 the park was made a part of Nez Perce National Historical Park, which consists of 38 separate locations in five different states, following the flight of the Nez Percé tribe from the U.S. Cavalry.

Old Chief Joseph: Tuekakas, commonly known as Old Chief Joseph or Joseph the Elder (c. 1785-1871), was a Native American leader of the Wallowa Band of the Nez Perce.  Old Joseph was one of the first Nez Percé converts to Christianity and a vigorous advocate of the tribe's early peace with whites.  In 1855 he aided Washington's territorial governor and set up a Nez Percé reservation that expanded from Oregon into Idaho.  The Nez Perce agreed to give up a section of their tribal lands in return for an assurance whites would not intrude upon the sacred Wallowa Valley.

Battle of the Big Hole: The Battle of the Big Hole was fought in Montana, August 9–10, 1877, between the U.S. Army and the Nez Perce tribe of Native Americans during the Nez Perce War.  Both sides suffered heavy casualties.  The Nez Perce withdrew in good order from the battlefield and continued their long fighting retreat that would result in their attempt to reach Canada and asylum.

Looking Glass (Native American leader): Looking Glass ("Allalimya Takanin" 1832- 1877) was a principal Nez Perce architect of many of the military strategies employed by the Nez Perce during the Nez Perce War of 1877.  He, along with Chief Joseph, directed the 1877 retreat from eastern Oregon into Montana and onward toward the Canada–US border during the Nez Perce War.  He led the Alpowai band of the Nez Perce, which included the communities of Asotin, Alpowa, and Sapachesap along the Clearwater River in Idaho.  He inherited his name from his father, the prominent Nez Percé chief Apash Wyakaikt (“Flint Necklace”) or Ippakness Wayhayken (“Looking Glass Around Neck”) and was therefore called by the whites "Looking Glass".

Nez Perce County, Idaho: Nez Perce County (pron.  "Nezz Purse") is a county located in the U.S. state of Idaho.  As of the 2010 census, the population was 39,265.  The county seat is Lewiston.  The county is named after the Nez Percé tribe.

Supporting paragraphs: Poker Joe Battle of the Big Hole
Answer: 1877