Question: Which states are consistently included in the region where the Cayuse War took place?

Context paragraphs:
First Jewish–Roman War: The First Jewish–Roman War (66–73 CE), sometimes called the Great Revolt (Hebrew: המרד הגדול‎ ‎ "ha-Mered Ha-Gadol "), was the first of three major rebellions by the Jews against the Roman Empire, fought in the Eastern Mediterranean.  The First Jewish–Roman War took place mainly in Judea Province (Iudaea); the second was the Kitos War in 115–117, which took place mainly in the diaspora (in Cyprus, Egypt, Mesopotamia and only marginally in Judea), and the third was Bar Kokhba's revolt of 132–136 CE, concentrating in Judea province.

1967 Opium War: The 1967 Opium War took place in northwestern Laos between February and August 1967; actual fighting took place from 29 July to 1 August 1967.  A Burmese mule train carrying 16 tons of opium crossed into Laos to Ban Khwan, where they were attacked by rival drug smugglers from the Chinese Nationalist's Third and Fifth Armies.  The intended recipient of the shipment, Royal Lao Army General Ouane Rattikone, bombed both sides while moving in troops to sweep the battlefield.  With both Burmese and Nationalist Chinese defeated and expelled from Laos, the Lao general confiscated the opium for himself.

Bayano Wars: The Bayano Wars were armed conflicts in the Isthmus of Panama that occurred between the Bayano of Panama and the Spanish crown.  The First War of the Bayano took place from 1548 to 1558, while the Second War took place from 1579 and 1582.  Slavery, practiced since the early sixteenth century in Panama, brought many enslaved people from Africa to Spanish America.  This brought successive uprisings of slaves against the rulers of the time, which was the origin for the Bayano Wars.

Early life and career of Ulysses S. Grant: The early life and career of Ulysses S. Grant (born Hiram Ulysses Grant; April 27, 1822 – July 23, 1885) tells the story of the future general's ancestry, birth, and early career in and out of the United States army from 1822 to 1861.  Grant was born in Ohio in 1822.  Growing up in his father's tanneries, he sought a different career in the military.  After four years at West Point, he was stationed in Missouri, where he met his future wife, Julia Dent.  In 1846, Grant served in the Mexican—American War, where he was brevetted for bravery.  After the war, he was assigned to posts in New York and Michigan before traveling West to a posting Fort Vancouver and at Fort Humboldt in present-day northern California.  Grant's tenure in the Pacific Northwest included the aftermath of the Cayuse War.  After accusations of drunkenness while on duty at Fort Humboldt, Grant was compelled to resign, and returned to Missouri and his family.  Six years of civilian life were difficult for Grant, as he had little aptitude for business or farming.  In 1859, the family moved again, to Galena, Illinois, where Grant had a job as a clerk in his father's leather shop.  He worked there until 1861, when the American Civil War began.

Cayuse War: The Cayuse War was an armed conflict that took place in the Northwestern United States from 1847 to 1855 between the Cayuse people of the region and the United States Government and local American settlers.  Caused in part by the influx of disease and settlers to the region, the immediate start of the conflict occurred in 1847 when the Whitman Massacre took place at the Whitman Mission near present day Walla Walla, Washington when fourteen people were killed in and around the mission.  Over the next few years the Provisional Government of Oregon and later the United States Army battled the Indians east of the Cascades.  This was the first of several wars between the Indians and American settlers in that region that would lead to the negotiations between the United States and Indians of the Columbia Plateau, creating a number of Indian reservations.

Russo-Georgian War: The Russo-Georgian War was a war between Georgia, Russia and the Russian-backed self-proclaimed republics of South Ossetia and Abkhazia.  The war took place in August 2008 following a period of worsening relations between Russia and Georgia, both formerly constituent republics of the Soviet Union.  The fighting took place in the strategically important Transcaucasia region.  It was regarded as the first European war of the 21st century.

Whitman massacre: The Whitman massacre (also known as the Walla Walla massacre and the Whitman Incident) was the murder of Oregon missionaries Marcus Whitman and his wife Narcissa, along with eleven others, on November 29, 1847.  They were killed by a party of Cayuse Native Americans who accused him of having poisoned 200 Cayuse in his medical care.  The incident began the Cayuse War.  It took place in present-day southeastern Washington state, near the town of Walla Walla, and was one of the most notorious episodes in the U.S. settlement of the Pacific Northwest.  The event was the climax of several years of complex interaction between Whitman, who had helped lead the first wagon train to cross Oregon's Blue Mountains and reach the Columbia River via the Oregon Trail, his wife and fellow missionary Narcissa, and the local Native Americans.  The story of the massacre shocked the United States Congress into action concerning the future territorial status of the Oregon Country.  The Oregon Territory was established on August 14, 1848.

Creek War: The Creek War (1813-1814), also known as the Red Stick War and the Creek Civil War, was a regional war between opposing Creek factions, European empires, and the United States, taking place largely in today's Alabama and along the Gulf Coast.  The major conflicts of the war took place between state militia units and the "Red Stick" Creeks.

Northwestern United States: The Northwestern United States is an informal geographic region of the United States.  The region consistently includes the states of Oregon, Washington, and Idaho—and usually Montana and Wyoming.  Some sources include southeast Alaska in the Northwest.  The related but distinct term "Pacific Northwest" generally excludes areas from the Rockies eastward.

Lists of protests against the Vietnam War: Protests against the Vietnam War took place in the 1960s and 1970s.  The protests were part of a movement in opposition to the Vietnam War and took place mainly in the United States.

Supporting paragraphs: Cayuse War Northwestern United States
Answer: Oregon, Washington, and Idaho