According to legend, Rome was founded on April 21, 753 BC, by Romulus, who became its first king after killing his twin brother, Remus, during a dispute. Traditionally, they were sons of Mars, abandoned and suckled by a she-wolf. Historically, Rome developed from pastoral settlements on the Palatine Hill.

The United States was founded between 1776 and 1789 through a revolution against Great Britain, formal declaration of independence, and the ratification of the Constitution. Key events included the 1776 Declaration of Independence, the 1783 Treaty of Paris recognizing sovereignty, and the 1787 Constitutional Convention establishing a federal republic.

World War II (1939–1945) was the deadliest global conflict in history, involving more than 50 nations and resulting in an estimated 70 to 85 million deaths. The war was fought between two major military alliances: the Allies (led by the U.S., UK, Soviet Union, and China) and the Axis Powers (led by Nazi Germany, Imperial Japan, and Fascist Italy).

"Video Killed the Radio Star" by The Buggles is most famous for being the first music video ever played on MTV. It debuted at 12:01 a.m. on August 1, 1981, marking a major shift in how music was consumed—moving from an audio-only medium (radio) to a visual one (television).

"We Are the World" is a historic charity single recorded in 1985 by the supergroup USA for Africa. Written by Michael Jackson and Lionel Richie and produced by Quincy Jones, the song was created to raise funds for famine relief in Ethiopia.

The Y2K bug (Year 2000 problem) was a widespread computer glitch feared to cause global catastrophe when systems moved from 1999 to 2000, as two-digit date coding might interpret "00" as 1900 rather than 2000.

The September 11 attacks, commonly referred to as 9/11, were a series of four coordinated suicide terrorist attacks carried out by the Islamist extremist group al-Qaeda against the United States on the morning of Tuesday, September 11, 2001.