The Soviet Union detonated its first nuclear weapon, "First Lightning" (Joe-1), at the Semipalatinsk test site in Kazakhstan, ending the American nuclear monopoly and launching the atomic arms race that defined the Cold War. The test shocked American leaders who had expected the Soviet program to take years longer.
Ottoman Sultan Suleiman the Magnificent destroyed the Kingdom of Hungary at the Battle of Mohacs, killing King Louis II and roughly 14,000 Hungarian soldiers in under two hours. The Ottoman victory ended medieval Hungary, opened Central Europe to Ottoman expansion, and established the fortified Habsburg-Ottoman frontier that would persist for 160 years.
Francisco Pizarro executed Atahualpa, the last Sapa Inca of the Inca Empire, despite receiving a ransom room filled with gold and silver. The execution completed the Spanish conquest of the largest empire in pre-Columbian America and opened South America to European colonization and military domination.
The German encirclement of the Russian Second Army was completed at Tannenberg in East Prussia, resulting in the capture of 92,000 Russian soldiers and the virtual destruction of the entire army. Russian General Samsonov shot himself in the forest rather than face the Tsar. The victory made Hindenburg and Ludendorff national heroes.
The International Red Cross reported that Japan was blocking access to Allied prisoner-of-war camps, concealing the brutal conditions in which hundreds of thousands of POWs were being held. The refusal to allow inspections violated the 1929 Geneva Convention and masked atrocities including forced labor, starvation, and medical experiments.
USS Harder (SS-257), a Gato-class fleet submarine, was commissioned at Electric Boat in Groton, Connecticut. Under Commander Samuel Dealey she would become the most successful submarine of the Pacific War in terms of warship kills, sinking five Japanese destroyers in a single patrol before being lost with all hands in August 1944.
Slovak Army units and partisan formations launched an armed uprising against German occupation forces and the collaborationist Slovak government, coordinated with approaching Soviet forces. The uprising ultimately failed after two months of hard fighting, but it tied down three German divisions at a critical phase of the war in Central Europe.
The Soviet Union detonated its first nuclear weapon, "First Lightning" (Joe-1), at the Semipalatinsk test site in Kazakhstan, ending the American nuclear monopoly and launching the atomic arms race that defined the Cold War. The test shocked American leaders who had expected the Soviet program to take years longer.
Soviet nuclear engineers at Arzamas-16 completed the final assembly of the RDS-1 device hours before the Semipalatinsk test. The implosion assembly used a 5-kilogram plutonium pit surrounded by 32 explosive lenses of cast and machined high explosive, the first physical weapon produced by the Soviet nuclear program under Igor Kurchatov.
AM General Corporation delivered the 100,000th M998 High Mobility Multipurpose Wheeled Vehicle (HMMWV) from its Mishawaka, Indiana plant. The Humvee had replaced the M151 jeep, M274 Mule, and several other light tactical vehicles across the U.S. military, and by 1993 it was the backbone of Army and Marine Corps light tactical mobility worldwide.
Hurricane Katrina's storm surge breached the levees protecting New Orleans, flooding 80% of the city and causing over 1,800 deaths. The Coast Guard rescued over 33,000 people by helicopter and boat in the largest rescue operation in its history, while the National Guard deployed tens of thousands of troops for relief operations.
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English philosopher whose theories of natural rights, government by consent, and the right of revolution directly inspired the American Declaration of Independence and the political philosophy that justified the American Revolution, the intellectual foundation for the military struggle against British rule.
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Naval aviator who spent five and a half years as a prisoner of war in North Vietnam after his plane was shot down over Hanoi in 1967. He refused early release (offered because his father was an admiral), enduring torture and solitary confinement. He later served as a U.S. Senator for 31 years and ran for President in 2008.
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Commander of the Russian Second Army who shot himself in the forests of East Prussia as his army was annihilated at the Battle of Tannenberg. His body was found by German soldiers. The disaster at Tannenberg eliminated one of Russia's two invading armies and marked the beginning of Russia's long military decline in World War I.
10 military events occurred on August 29, spanning multiple centuries. Key events include: First Soviet Nuclear Test (1949), Battle of Tannenberg Concludes (1914), Hurricane Katrina Devastates Gulf Coast (2005).
The most significant military event on August 29 is First Soviet Nuclear Test (1949). The Soviet Union detonated its first nuclear weapon, "First Lightning" (Joe-1), at the Semipalatinsk test site in Kazakhstan, ending the American nuclear monopoly and launching the atomic arms race that defined the Cold War. The test shocked American leaders who had expected the Soviet program to take years longer.
Notable military figures born on August 29 include John Locke (1632–1704), John McCain (1936–2018).
Events on August 29 span the Cold War, World War I, World War II, the Modern Era, the Colonial & Revolutionary era, covering 10 events across 3 centuries of military history.
Events on August 29 involve 5 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.
February 6
1952
February 11
1990
February 20
1962
February 28
1953
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 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.
Nineteen armies on four continents chose the Leopard 2. No other Western tank comes close to this export record, and the reasons go far beyond German engineering.
