Two things happened in 1918, and they pointed in opposite directions. In town, the boom’s daily life acquired a landmark name: Akimel O’odham farmers from the Salt River community east of Scottsdale, regulars in the town’s commerce, tied their wagons along First Avenue in a row everyone began calling Pima Plaza. There was a rough justice in the geography — the crop making everyone rich carried their people’s name too, honoring the Akimel O’odham farmers who had developed the long-staple variety at the USDA farm near Sacaton.
Around that wagon row, Scottsdale was running at full wartime throttle: fields in cotton to the fencerows, gins working around the clock, and newly arrived Mexican and Mexican-American families settling south and east of the townsite. The quiet Baptist village of 1912 was, for the moment, a commodity town.
The armistice starts the clock
Then, on November 11, the guns in Europe stopped — and wartime procurement stopped with them. Cotton prices did not; running on momentum and speculation, they kept climbing into 1920, which made the moment stranger. Every farmer in the Valley understood that the smart move was to diversify back out of cotton before the wartime market’s ghost gave out. Almost nobody did.
Scottsdale ended 1918 richer than it had ever been and staked entirely on a single commodity. The bill arrived in 1920–21; the crash, and the town’s improbable reinvention around Main Street merchants and winter guests, belongs to the 1920s.