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Today in History: Pentagon dedicated as world's largest office building

1/15/2026

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Summary

Story summary

On January 15, 1943, the Pentagon, the world's highest-capacity office building and headquarters of the United States Department of Defense, was officially dedicated. Located in Arlington, Virginia, it serves as a symbol of the U.S. military and plays a crucial role in coordinating the Armed Forces to ensure national security.

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Story summary

On January 15, 1943, the Pentagon, the world's highest-capacity office building and headquarters of the United States Department of Defense, was officially dedicated. Located in Arlington, Virginia, it serves as a symbol of the U.S. military and plays a crucial role in coordinating the Armed Forces to ensure national security.