Today in History: What Happened on April 21

Last Updated: Apr 21, 2026, 08:56 IST

Today in History, April 21: Explore the founding of Rome, the First Battle of Panipat, and the legacy of Prince. Discover key events that shaped our world.

21st April: What Happened on this Day in History
21st April: What Happened on this Day in History

On this day, April 21, the world saw the birth of ancient empires and modern democratic institutions. From the founding of Rome to the fateful battle of Panipat in India, it is a critical landmark that connects the past with the present. Today in History celebrates the events of extraordinary military tactics and the most significant changes in culture that transformed the boundaries of the world. These occurrences make us remember that the history of our modern world was frequently founded in one radical day. We will look at the major developments that defined this day in history.

21st April: What Happened on this Day in History 

The following are the list of events that happened on this day in history in the world. The events are chronologically organized.

Founding of Rome - 753 BC

Romulus was the founder of the city of Rome according to the ancient legend who killed his twin brother, Remus on this day. This is the date of the commencement of the Roman Kingdom which later turned into a Republic and a huge Empire. It created a central authority in the Italian peninsula at the time that would rule the Mediterranean centuries to come. This is now marked as Natale di Roma today, as a reminder of the longstanding impact of Roman law, language, and architecture on Western civilization.

First Battle of Panipat - 1526

The Timurid ruler Babur, the ruler of Kabul, overcame the huge army of Ibrahim Lodi, the Sultan of Delhi. Babur employed better strategies and gunpower, such as field guns, to defeat an army that was by far bigger than his. The success of this battle was a decisive blow to the Lodi Dynasty and the start of the Mughal Empire in India. 

First U.S. Vice President, John Adams, Sworn in - 1789

John Adams was sworn in as the first Vice President of the United States, nine days prior to the oath-taking of George Washington as President. Adams was instrumental in establishing the legislative responsibilities of the office as the Senate president. His service laid the groundwork of the early traditions of the American executive branch amidst a time of great political uncertainty. Contemporary historians consider his rule as a cornerstone of American rule and the smooth change of democratic rule.

The Battle of San Jacinto for Texas Independence - 1836

This battle took place in a duration of eighteen minutes and General Sam Houston led the Texian Army to a decisive victory over the Mexican forces under the leadership of General Antonio Lopez de Santa Anna. This conflict ended the Texas Revolution and led to the creation of the Republic of Texas. The triumph essentially changed the map of North America and ultimately resulted in the annexation of Texas to the United States. San Jacinto is remembered today as one of the turning points in the territorial growth and cultural identity of the American West.

Did You Know?

Although the establishment of Rome is marked on April 21 every year, it was not until centuries later that the Roman scholar Varro would finally arrive at the 753 BC date. He counted the date, by going backwards through books of Roman consuls!

The "Red Baron" is Shot Down and Killed - 1918

The most renowned fighter pilot of World war I was Manfred von Richthofen who died when his airplane was struck during a dogfight in northern France. He was the called Red Baron and was credited with eighty official aerial victories for the German Air Force. His demise marked the end of what was called the age of knights of the air and also indicated the growing deadliness of modern mechanized warfare. He is still an icon of the youth in the history of aviation .

National Civil Services Day is Established in India - 1947

The first group of civil servants was addressed by Sardar Vallabhbhai Patel, the first Home Minister of independent India at Metcalf House in Delhi. He referred to the administrative officers as the steel frame of India in keeping India united. This speech laid the groundwork for the modern Indian Administrative Service (IAS) and other central services. In modern times, the 21st April is known as the Civil Services Day in India, a day when the common people are reminded of the contributions of people in civil services who enforce the policies set by the government and maintain order in the country.

Brasília is Officially Inaugurated as Brazil's Capital - 1960

The Brazilian government moved its capital from Rio de Janeiro to the newly built city of Brasília, located in the country's central highlands. The city was constructed in only forty-one months, the work of urban planner Lúcio Costa and architect Oscar Niemeyer, to promote the growth of the interior of Brazil. It is one of the masterpieces of modernistic architecture and urban planning, which has been recognized as a UNESCO World Heritage site. The relocation is a daring illustration of how a country can utilize infrastructure to change its economic and social priorities.

Protests by students start in Tiananmen Square - 1989

About 100,000 university students assembled at the Tiananmen Square in Beijing to lament the death of pro-reform leader Hu Yaobang and to press for more political freedom. These early meetings became a huge pro-democracy movement that attracted international attention over several weeks. The subsequent government crackdown is a very sensitive and important issue in international relations. The events of 1989 still have a bearing in the way the world perceives political reform and human rights in the globalized economy.

Prince, Global Pop Icon, dies - 2016

Prince Rogers Nelson, the legendary musician was found dead at the age of 57 in his Paisley Park estate in Minnesota. Prince was a multi-instrumentalist and prolific songwriter, selling more than 100 million records in his career and having won seven Grammy Awards. His distinctive funk, rock, and soul music defied social conventions and reestablished the frames of the popular music. His demise caused a ripple of sorrow all over the world to remind the world about the impact he had on art, fashion, and the music industry.

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Mrigank Chakraborty
Mrigank Chakraborty

Deputy Manager - Editorial

Mriganka Chakraborty is a seasoned digital journalist and communications professional who is currently working as Deputy Manager at Jagran Josh, where he leads the General Knowledge Section. As a subject matter expert with 8+ years of editorial experience, he has created authoritative content that is trusted by millions of readers around the world in Science, History, Geography, Polity, Economy, Sports, and Technology. His extensive expertise in these subjects enables him to present complex topics in an engaging, accurate, and reader-friendly manner to a global audience, making learning addictive and fun.

His background in a wide range of content areas and his ability to move between them make him a trusted voice to readers who want reliable, well-researched content across a variety of disciplines.
In his leisure time, Mriganka enjoys reading fiction novels and watching action and thriller movies, and cricket, which not only hone his storytelling skills but also keep his editorial vision fresh and dynamic.

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First Published: Apr 21, 2026, 08:56 IST

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