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World War II was a global conflict that reshaped the 20th‑century order, drawing more than 100 million men and women into combat, industry and home‑front service across six continents. From the deserts of North Africa to the jungles of the Pacific, the war demanded a massive mobilization of American manpower, and Wisconsin answered in force. More than 600,000 Wisconsinites enlisted or were drafted, a quarter of the state’s working‑age population, and they served in every theater of operations.

The most celebrated of these units was the 32nd Infantry Division, the “Red Arrow” division, composed largely of National Guard troops from Milwaukee, Madison and the state’s rural counties. After intensive training at Camp MacArthur in Waco, Texas, the Red Arrow landed on Guadalcanal in 1943, fought fiercely on New Guinea’s rugged terrain, and helped secure the Philippines, earning ten Medals of Honor and a reputation for tenacity that became a point of pride for the Badger State.

Wisconsin’s contribution did not stop with the 32nd. The 42nd Infantry “Rainbow” Division, a veteran formation that included thousands of Wisconsinites, saw heavy action in the Normandy breakout, the Battle of the Bulge and the push into Germany. The 34th Infantry Division—partly composed of Wisconsin National Guard soldiers—played a pivotal role in the Italian campaign, storming Monte Cassino and advancing through the Po Valley. Beyond the front lines, the state’s factories turned out tanks, aircraft engines, ammunition and the famed “Wisconsin Dells” of steel that kept the war machine moving, while the University of Wisconsin’s research labs contributed to radar and medical advances. By war’s end, more than 12,000 Wisconsinites had made the ultimate sacrifice, and countless others returned home carrying the stories of courage, hardship and camaraderie that continue to define Wisconsin’s place in World War II history.