This region's namesake "organic laws" helped free a slave family in Holmes v. Ford.
This region's namesake "organic laws" helped free a slave family in Holmes v. Ford. After a measles epidemic in this territory, the Cayuse killed a missionary named Marcus Whitman, the leader of the "great migration". A leader of a tribe based in this territory ended one oration with the words "From where the sun now stands, I will fight no more forever", and led the Nez Perce. The northern boundary of its namesake state gave rise to the slogan "54 40 or fight", helping James Polk win the presidency. This territory named a long trek that started in Independence, Missouri. For 10 points, name this Northwestern territory in the Willamette Valley, the namesake of a famous "trail". 
This region's namesake "organic laws" helped free a slave family in Holmes v. Ford.
Oregon Territory [accept Oregon Country]