Legendary Eagle Scout (+50% hit points and attack)
Note: probably due to a bug, the Eagle Scout is upgraded to Legendary in the Industrial Age instead of in the Imperial Age. This causes the upgrade to stack with the Champion upgrade and the Eagle Scout gain a total of +75% hit points and attack upon reaching the Industrial Age.
Europeans who colonized the Americas often sought help from Native American scouts. The scouts were mostly used to gather intelligence on enemy military movements. In 1866, Congress passed a statute that established a branch of the military known as the "Indian Scouting Service." This formalized the relationship between Native American Scouts and the United States Army. When fighting Native Americans in the west, the United States made use of historic tribal animosities by recruiting scouts from the enemy of whomever they were fighting. For example, Pawnees scouted against the Cheyenne, and Crow scouts helped General Custer before the Battle of Little Bighorn.