Camp Adair, Oregon: The Most Intact Footprint of a World War II Army Training Camp

Camp Adair, in the Willamette Valley of northwestern Oregon, was built from scratch at the start of World War II to train soldiers for combat. Nearly all its buildings are long gone, but its street grid and hundreds of concrete foundations remain — possibly the most intact footprint of a U.S. Army World War II training cantonment anywhere. Archaeologists Rick Minor and Kathryn Anne Toepel of Heritage Research Associates described it at a 2019 National Park Service symposium on preserving U.S. military heritage.

Camp Adair in 1942: the main camp to the north, the hospital to the south. Image from the National Park Service's page

A city built in months

The Army chose the Corvallis area in July 1941, four months before Pearl Harbor, and settled on a site in mid-August. The reservation — over 56,000 acres straddling Highway 99 between Corvallis and Monmouth — displaced about 6,000 people, mostly small farmers, and some 600 schoolchildren; 10 cemeteries were moved. The small railroad community of Wells sat in the middle of the new cantonment and was erased.

Construction followed standard Army plans for low-cost temporary buildings, with crews of masons, carpenters and electricians moving assembly-line fashion from building to building — an approach postwar developers later adopted. The headquarters went up in 20 days. The two halves of the camp were near mirror images, so one division could live on each side, and the plan held 80 to 100 kinds of buildings. The barracks were of the 800 series, designed for forced-air heat but at Camp Adair still warmed by coal stoves.

With two divisions in training at once from 1942 to 1944, the population reached about 40,000 — making Camp Adair, briefly, Oregon's second-largest city, after Portland.

Training for war

Four infantry divisions trained here — the 70th, 91st, 96th and 104th. Each was meant to be about 15,500 troops, with three rifle regiments of three battalions each. They trained with small arms, explosives, mortars, anti-tank and anti-aircraft guns, tanks and artillery spotter planes. Three stayed 10 to 12 months; the fourth left after three months to finish training at Fort Leonard Wood.

Realistic combat training at Camp Adair. Image from the National Park Service's page

Troops ran up and down a nearby low mountain with a grim name for men headed to war: Coffin Butte. The winters of 1942–43 and 1943–44 were severe, and standing water earned the post a nickname: "Swamp Adair."

"Swamp Adair." Image from the National Park Service's page

The 96th went to the Pacific and fought in the invasion of Leyte in the Philippines; the other three fought in Europe. Together the four divisions lost 26,436 men killed in battle, with more than 20,000 wounded, and nine of their soldiers received the Medal of Honor.

After the war

After the last division left in July 1944, the camp held prisoners of war — first Italians, then Germans, perhaps as many as 1,200 at the peak, who helped with the harvest and remained almost a year after the war in Europe ended. Declared surplus, the camp was dismantled from 1947; its lumber went into houses across the valley, and its chapels were moved all over western Oregon — one as far as Crescent City, California.

In 1950, much of the former cantonment became the E. E. Wilson Wildlife Area, run by the Oregon Department of Fish and Wildlife (ODFW). In 2015, ODFW moved to remove most of the remaining World War II structures to improve rabbit and bird habitat for hunters — which prompted the archaeological assessment.

What survives

The site was quickly found eligible for the National Register. With a period map, you can drive the streets and name the building that stood on each foundation; lidar, which strips away the vegetation, shows the whole plan at once. Below ground there are likely buried dumps too.

The authors argue it is better understood not as an archaeological site but as a historic military landscape: it still shows its military mission, its siting and layout, its military traditions, and the repetitive, standardized construction of wartime camps — and, with few entrance roads, even a sense of restricted access.

A landscape of memory

Veterans came back for decades to walk where they had lived and trained, and the foundations became anchors for memory — though the site has had very little interpretation. As the war recedes, the authors argue, preserving places like Camp Adair matters more for teaching later generations about the scale of the mobilization and the soldiers' sacrifices. They'd like to see the land pass to a county or state park system — or someday the National Park Service.

Sources

Based on Rick Minor and Kathryn Anne Toepel, "Preserving the Historic Military Landscape at Camp Adair," a presentation at Preserving U.S. Military Heritage: World War II to the Cold War (June 4–6, 2019, Fredericksburg, Texas), National Park Service, National Center for Preservation Technology and Training; a work of the United States government in the public domain; rewritten in hubnx's own words. The abstract and the talk give different counts of the Army's new wartime camps and of Camp Adair's buildings, so only the site-record figures are given here.