This Day in History - The Kootenai Tribe declared war on the U.S. in 1974... ...and won.

http://www.indiancountrytoday.com/national/The-Kootenai-Tribes-forgotten-war-101164449.html

"The date was Sept. 20, 1974 when Amy Trice, then chairman of the Kootenai Tribe of Idaho, declared war on the United States. The tribe only numbered 67. The odds certainly weren’t good but the outcome, now 36 years later, has been very good."