At 4:17 PM EDT, the Apollo 11 lunar module Eagle lands on the Moon's Sea of Tranquility, with former Navy pilot Neil Armstrong and Air Force Colonel Buzz Aldrin becoming the first humans to walk on another world, the ultimate triumph of the Cold War space race.
A political crisis in Bogota escalates into open revolt against Spanish colonial rule, with creole military officers and civilian leaders declaring independence and opening a long war of liberation that would be led by Simon Bolivar.
Confederate General John Bell Hood launches his first major attack after assuming command, striking General Thomas's forces as they cross Peachtree Creek outside Atlanta. The Union repulses the assault with heavy Confederate losses.
British Columbia enters the Canadian Confederation as its sixth province on the promise of a transcontinental railway, reshaping North American strategic geography and the defensive posture of both Canada and the United States.
Hunkpapa Lakota leader Sitting Bull surrenders to U.S. Army forces at Fort Buford in Dakota Territory, ending years of resistance following the Great Sioux War and the Battle of the Little Bighorn.
Secretary of War Newton Baker draws the first numbers in the World War I draft lottery, determining the order in which 10 million registered American men would be called to military service.
Colonel Claus von Stauffenberg detonates a bomb at Hitler's Wolf's Lair headquarters in East Prussia, but the Führer survives. The failure of the July 20 plot led to the execution of over 200 conspirators and eliminated the last organized resistance to the Nazi regime.
King Abdullah I of Jordan is shot dead at the Al-Aqsa Mosque in Jerusalem, an event that destabilized Arab-Israeli military calculations during the first phase of the Korean War and reshaped Hashemite military policy toward Israel for a decade.
USS George Washington successfully launches a Polaris A-1 ballistic missile while submerged off Cape Canaveral, the first submarine-launched ballistic missile firing, creating the sea-based nuclear deterrent that remains a cornerstone of American defense.
Columbia-Class vs. Ohio-Class Submarine ComparisonAt 4:17 PM EDT, the Apollo 11 lunar module Eagle lands on the Moon's Sea of Tranquility, with former Navy pilot Neil Armstrong and Air Force Colonel Buzz Aldrin becoming the first humans to walk on another world, the ultimate triumph of the Cold War space race.
Turkish forces land on the northern coast of Cyprus in Operation Atilla, beginning a multi-phase invasion that partitions the island and establishes a NATO-vs-NATO confrontation whose unresolved status still shapes Eastern Mediterranean military planning.
NASA's Viking 1 lander sets down on the Chryse Planitia plain of Mars, the first successful American landing on another planet, validating navigation and entry technologies developed with support from the U.S. Air Force space program.
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11 military events occurred on July 20, spanning multiple centuries. Key events include: Apollo 11 Lands on the Moon (1969), Operation Valkyrie, Assassination Attempt on Hitler (1944), Battle of Peachtree Creek (1864), First Polaris Missile Launched from a Submarine (1960).
The most significant military event on July 20 is Apollo 11 Lands on the Moon (1969). At 4:17 PM EDT, the Apollo 11 lunar module Eagle lands on the Moon's Sea of Tranquility, with former Navy pilot Neil Armstrong and Air Force Colonel Buzz Aldrin becoming the first humans to walk on another world, the ultimate triumph of the Cold War space race.
Notable military figures born on July 20 include Sir Edmund Hillary (1919–2008).
Events on July 20 span the Cold War, World War II, the Civil War, the Interwar Period, World War I, the Colonial & Revolutionary era, covering 11 events across 2 centuries of military history.
Events on July 20 involve 3 branches of the U.S. and allied armed forces, reflecting the global scope of military operations throughout history.
Explore military history from the day you were born.
June 6
The Allied invasion of Normandy, the largest amphibious assault in history.
December 7
Japan attacks the U.S. Pacific Fleet, bringing America into World War II.
September 11
The deadliest terrorist attack in history transforms U.S. national security.
August 6
The first atomic bomb is dropped on a city, ushering in the nuclear age.
May 8
Nazi Germany surrenders unconditionally, ending World War II in Europe.
November 11
Armistice Day marks the end of World War I and honors all who served.
June 4
The turning point of the Pacific War as the U.S. Navy destroys four Japanese carriers.
July 4
The Declaration of Independence is adopted, sparking the American Revolution.
The Columbia-class will replace the aging Ohio-class as America's sea-based nuclear deterrent. Here is how the two compare and why the program matters.
The FIM-92 Stinger helped win the Cold War by turning Afghan mujahideen into a credible anti-aircraft threat. By 2023, the United States almost ran out of them, because Raytheon stopped making them for 13 years, and the first 10 months of Ukraine support burned through the remaining stockpile.
These weapons were built to fight a war that everyone prayed would never happen. The Minuteman III has been on alert since 1970. The Typhoon-class carried enough nuclear warheads to destroy a continent. The Davy Crockett could be fired by three soldiers. Most of them have been waiting for 40 years. Here are 10 Cold War weapons built exclusively for World War III.
The MiG-31 was designed to catch the SR-71 Blackbird. It is still the fastest fighter in any air force. The Foxhound's Zaslon phased-array radar, the first ever installed in a fighter, can track 10 targets and engage 4 simultaneously at ranges exceeding 200 miles. Here is why Russia still flies a 1980s interceptor, and why the MiG-31BM carrying a Kinzhal hypersonic missile has changed what the aircraft means to modern warfare.
