Before revision: Supplies for the Windmill Expedition, 1947 Operation Windmill (OpWml) was the United States Navy's Second Antarctica Developments Project, an exploration and training mission to Antarctica in 1947–1948.
After revision: 260px|Supplies for the Windmill Expedition, 1947 Operation Windmill (OpWml) was the United States Navy's Second Antarctica Developments Project, an exploration and training mission to Antarctica in 1947–1948.