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Major General Eugene Reybold of the U.S. Army Corps of Engineers authorizes the construction of facilities that would house the "Development of Substitute Materials" project, better known as the Manhattan Project.

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Eugene Reybold
20th-century American military official
Eugene Reybold was distinguished as the World War II Chief of Engineers who directed the largest United States Army Corps of Engineers in the nation's history.Source: Wikipedia (CC BY-SA)
United States Army Corps of Engineers
Direct reporting unit and U.S. Army's branch for military engineering
The United States Army Corps of Engineers (USACE) is the military engineering branch of the United States Army. A direct reporting unit (DRU), it has three primary mission areas: Engineer Regiment, military construction, and civil works. USACE has 37,000 civilian and military…Source: Wikipedia (CC BY-SA)
Manhattan Project
World War II Allied nuclear weapons program
The Manhattan Project was a research and development program undertaken during World War II to produce the first nuclear weapons. It was led by the United States in collaboration with the United Kingdom and Canada.Source: Wikipedia (CC BY-SA)