This Day In History

Today, April 21st

Recent stories…

 Micronesia #155b
April 20, 1918

Red Baron’s Final Victory

On April 20, 1918, Manfred von Richthofen—known around the world as the Red Baron—shot down his 80th enemy aircraft, setting a record for World War I. Within a day, his remarkable career would come to an abrupt end, cementing his place as the war’s most recognized flying ace.

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#3067 - 1996 32c Marathon
April 19, 1897

First Boston Marathon

The first-ever Boson Marathon was run on April 19, 1897. It’s the world’s oldest annual marathon and is one of the six World Marathon Majors. While the first race included 15 runners, recent races have seen over 30,000 participants.

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#727 - 1933 3c Peace of 1783 Sesquicentennial
April 18, 1783

Washington’s Proclamation of Peace

On April 18, 1783, General George Washington issued a proclamation announcing the end of hostilities in the American Revolutionary War. After eight years of fighting, the Continental Army was finally told to stand down, though the path to peace had already been set in motion months earlier.

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#3134 - 1997 32c Literary Arts: Thornton Wilder
April 17, 1897

Birth of Thornton Wilder

On April 17, 1897, playwright and novelist Thornton Wilder was born in Madison, Wisconsin. Over the next several decades, he would become one of America’s most respected writers, known for works that explored everyday life with unusual clarity and structure.

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More International History stories…

 Micronesia #155b
April 20, 1918

Red Baron’s Final Victory

On April 20, 1918, Manfred von Richthofen—known around the world as the Red Baron—shot down his 80th enemy aircraft, setting a record for World War I. Within a day, his remarkable career would come to an abrupt end, cementing his place as the war’s most recognized flying ace.

Read Article
#UN443 - 1985 ILO Turin Center
April 11, 1919

International Labour Organization Founded 

On April 11, 1919, the International Labour Organization was created, marking a coordinated effort to improve working conditions across countries after World War I. Born out of both wartime strain and postwar planning, it introduced a new idea—that fair labor standards could support lasting peace.

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#126
1896 Greece
April 6, 1896

First Modern Olympic Games 

On April 6, 1896, the first Olympic Games in 1,500 years began in Athens, Greece. Revived from ancient tradition, the modern Olympics brought nations together in a new era of international competition and athletic pride.

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#70830
1981 50k USSR Leonov Mint
March 18, 1965

First Human Spacewalk

On March 18, 1965, Alexei Leonov did what no human had ever done before—he stepped out of a spacecraft and into the vacuum of space. Suspended above Earth with only a thin tether holding him to life, Leonov’s daring walk marked a turning point in the early Space Race.

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More stories from April 21st…

1986 22¢ Republic of Texas
April 21, 1836

Battle of San Jacinto 

On April 21, 1836, Texan soldiers led a swift attack on an unsuspecting Mexican force at the Battle of San Jacinto. It was the final, decisive battle of the Texas Revolution.

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1962 4¢ Seattle Worlds Fair
April 21, 1962

Opening of Seattle World’s Fair 

On April 21, 1962, the Seattle World’s Fair, also known as the Century 21 Exposition, opened to the public. The fair’s themes of space and the future helped to make it a tremendous success – one of the few to turn a profit.

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# 1245 - 1964 5c John Muir
April 21, 1838

Happy Birthday John Muir

John Muir was born on April 21, 1838, in Dunbar, Scotland. Considered the “Father of the National Parks,” he dedicated most of his life to exploring wilderness and protecting it, most famously Yosemite Valley in California.

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3192 - 1998 32c "Remember the Maine"
April 21, 1898

Spanish-American War Begins

On April 21, 1898, Spain ended diplomatic relations with America and the US Navy established a blockade of Cuba, marking the official start of the Spanish-American War. The war would last less than four months, but saw the downfall of the Spanish Empire and the rise of America as a major world power with several new possessions.

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