Leslie Groves

Awards & Honours

Awards Won

Honours

Rankings

Covers

Records

Leslie Groves stands as one of the most effective military engineers in American history. His leadership of the Manhattan Project changed the course of the 20th century. Building the Pentagon in record time was a logistical marvel. He was promoted to lieutenant general with a backdated date to honor his role in the Trinity test. Biographers and historians consistently rank him among the top U.S. Army officers for engineering and logistics. His legacy is complex, but his impact is undeniable.

AwardsGroves received the Distinguished Service Medal for his leadership of the Manhattan Project, the Legion of Merit for his work on the Pentagon, and the Nicaraguan Presidential Medal of Merit for restoring Managua's water supply. He was also honored by Italy with the Order of the Crown of Italy and by the United Kingdom as an Honorary Knight Commander of the Order of the British Empire.

Honours & Distinctions

Lieutenant General (backdated to July 16, 1945)

United States Army·1948

Promoted to lieutenant general just before retirement; rank backdated to the date of the Trinity test.

Rankings & Lists

#Top 50

100 Most Influential People of World War II

Various history publications·2020

Magazine Covers

TIME

1945-10-29

The Atomic Bomb: How It Was Made

Life

1945-08-20

The Bomb and the Men Who Built It

Records & Feats

Oversaw construction of the world's largest office building (the Pentagon) in record time

Engineering Feat·1943

The Pentagon was built in just 16 months, from groundbreaking to first occupancy, under Groves' direction.

Led the largest secret scientific project in history (Manhattan Project)

Career Milestone·1945

The Manhattan Project employed over 125,000 people and cost nearly $2 billion (1940s dollars), all under Groves' management.