Five American Indian Iroquois tribes confederated to battle against their neighbors. They were operated jointly by NorthWestern Energy and the Confederated Salish and Kootenai Tribes. Other Nehalem are part of the unrecognized Clatsop Nehalem Confederated Tribes. They are one of the tribes incorporated into the Confederated Tribes of the Grand Ronde. Oakville is bordered on the east by the Confederated Tribes of the Chehalis Reservation. Their descendants are now considered part of the Confederated Tribes of Siletz. Congress enacted a law to unite the Miami tribe of Kansas with the Confederated Peoria. Approximately half of the Confederated Tribes' enrolled members live on or near the reservation. After the Civil War, most of the confederated tribe signed the 1867 Omnibus Treaty. The colonies were confederated by Queen Victoria in 1867 to form the Dominion of Canada. Haldimand commissioned Brant as Captain of the Northern Confederated Indians. The 18th century saw an institution known as a "confederated sejm" evolve. United or confederated states have in many cases adopted a jack representing their national union. Also in the 18th century an institution known as a "confederated sejm" evolved. In the 15th century the Ditmarsians confederated in a peasants' republic.