May 27 in Military History

American forces under General Winfield Scott captured Fort George on the Niagara frontier, forcing the British to abandon the entire Niagara peninsula in one of the most successful American operations of the War of 1812.

The Japanese Combined Fleet under Admiral Togo engaged the Russian Baltic Fleet in the Tsushima Strait, destroying virtually the entire Russian force in one of the most decisive naval battles in history.

Germany launched Operation Blücher-Yorck, the third of Ludendorff's spring offensives, smashing through Allied lines on the Chemin des Dames and advancing 40 miles to the Marne River.

The Century of Progress International Exposition opened in Chicago to commemorate the city's centennial. The fair's aviation exhibits, featuring Italian Air Marshal Italo Balbo's 24-plane formation flight from Rome, reshaped American public perception of strategic aviation and accelerated political support for expanded Army Air Corps funding.

The Golden Gate Bridge opened to vehicular traffic, connecting San Francisco to Marin County. The 4,200-foot main span immediately became a strategic asset for the U.S. Pacific Fleet, providing rapid road access between the San Francisco Presidio, Hamilton Field, and the expanding naval bases of the San Francisco Bay.

U.S. Senate Commerce Committee hearings continued in the aftermath of the Hindenburg disaster. The hearings ultimately preserved the Helium Act restrictions that denied the Germans helium for airship use and shaped U.S. Navy airship programs and strategic helium reserve policy for decades.

The Royal Navy sank the German battleship Bismarck after a dramatic three-day chase across the North Atlantic, killing approximately 2,100 of her crew.

Czech resistance operatives Jozef Gabčík and Jan Kubiš, trained by the British SOE, ambushed SS-Obergruppenführer Reinhard Heydrich in Prague. He died of his wounds on June 4, the highest-ranking Nazi killed during the war.

American forces landed on Biak Island in New Guinea, beginning a fierce battle against entrenched Japanese defenders in coral caves that lasted until August.

Actor Christopher Reeve suffered a catastrophic cervical spine injury in an equestrian accident at a competition in Culpeper, Virginia. His advocacy for spinal-cord-injury research over the subsequent decade shaped the congressional funding priorities of the Department of Defense Peer Reviewed Medical Research Program, which now distributes more than $400 million annually for combat-relevant medical research.