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Landmark day • Monday, November 11, 1918

November 11, 1918: The Armistice Starts the Cotton Clock

Peace in Europe is the beginning of the end for the boom that tripled the town — though it takes two more years of rising prices before anyone in Scottsdale believes it.

Illustrated plaque for November 11, 1918 in Scottsdale history SCOTTSDALE NOVEMBER 11 1918 STATEHOOD & THE FARM TOWN

What happened

The armistice took effect at 11 a.m. Paris time on November 11, 1918. Church bells and car horns marked it in the Valley as everywhere else. The military's emergency demand for long-staple cotton ended with the fighting, but prices — driven by speculation and the delayed return of Egyptian supply — kept climbing into 1920, and Scottsdale's farmers, like nearly everyone in the Salt River Valley, stayed all-in on a single crop.

Why it matters

The armistice set up the crash. When cotton fell from more than a dollar a pound toward a dime in 1920–21, the monoculture the war had created collapsed with it, and the town that emerged rebuilt its economy around Main Street merchants, a bank, a newspaper, and its first paying winter guests.

The day the demand ended

Scottsdale in November 1918 was running at full wartime throttle. The fields around town stood in Pima cotton to the fencerows, the gins worked through the night, and the wagon row on First Avenue where Akimel O’odham farmers tied up to trade had acquired its name, Pima Plaza, that same year. Newly arrived Mexican and Mexican-American families were settling south and east of the townsite. The quiet Baptist farm village of statehood was, for the moment, a commodity town, and the commodity had one customer that mattered: the war.

At eleven in the morning, Paris time, the customer went away. The armistice was a celebration in the Valley as it was everywhere — bells, horns, a day off — and for a farmer looking at the next season’s planting it was also a warning. The Army did not need balloon cloth and aircraft cord in peacetime. Egyptian cotton would come back across an Atlantic with no U-boats in it. Every grower in the Salt River Valley could do the arithmetic, and the sensible move was to diversify back into alfalfa and grain before the wartime market’s ghost gave out.

Why nobody did

Prices refused to cooperate with the warning. Running on speculation and the lag before foreign supply returned, long-staple cotton kept climbing through 1919 and into 1920, past a dollar a pound. A monoculture paying those prices is very hard to argue with, and almost nobody in the Valley argued. Scottsdale closed the decade richer than it had ever been and staked, to the last acre, on a crop whose real market had ended on this day.

The bill came in the fall of 1920, when the price broke and kept falling toward a dime. The Valley’s cotton economy collapsed within two seasons, bankruptcies and foreclosures followed, and the town that came out the other side had to become something else — a market town with a department store, a bank, a newspaper, a high school, and, from 1926, its first winter resort. That reinvention is the 1920s chapter. The rest of this year, including the naming of Pima Plaza, is at 1918.