Tag today in world history

Here are some significant events that occurred on this day in world history:

March 21

• 1513 - Juan Ponce de León becomes the first European to reach Florida.
• 1794 - Eli Whitney is granted a patent for the cotton gin, a machine that simplifies the process of removing seeds and other debris from cotton fibers.
• 1844 - The first telegraph message is sent across the Atlantic Ocean, from Queen Victoria to President James K. Polk.
• 1918 - The United States declares war on Germany, entering World War I.
• 1945 - The Soviet Union captures Budapest, Hungary, from German forces during World War II.
• 1960 - The Sharpeville massacre occurs in South Africa, as police open fire on a group of unarmed black protesters, killing 69 people and injuring many more.
• 1980 - The United States boycotts the Summer Olympics in Moscow, Russia, in response to the Soviet Union's invasion of Afghanistan.
• 2010 - The Deepwater Horizon oil spill in the Gulf of Mexico begins, releasing millions of gallons of oil into the ocean and causing widespread environmental damage.

These are just a few of the many significant events that have occurred on this day in world history.