The establishment of Jamestown, Virginia, the first permanent English settlement in North America.
The signing of the Declaration of Independence, which declared the United States as an independent nation.
he American Civil War, which resulted in the abolition of slavery and the reunification of the country.
The passage of the 19th Amendment, which granted women the right to vote in the United States.
The start of the Great Depression, a severe economic downturn that lasted for a decade.
The United States' entry into World War II after the attack on Pearl Harbor by Japan.
The Montgomery Bus Boycott, a civil rights movement that challenged racial segregation in public transportation in Montgomery, Alabama.
The March on Washington for Jobs and Freedom, where Martin Luther King Jr. delivered his famous "I Have a Dream" speech.
The Woodstock Music and Art Fair, a seminal event in the counterculture movement of the 1960s.
The Watergate scandal, which led to the resignation of President Richard Nixon.
The first national celebration of Martin Luther King Jr. Day as a federal holiday.
The Oklahoma City bombing, a domestic terrorist attack that killed 168 people and injured over 600 others.
The September 11 terrorist attacks, in which 2,977 people were killed in New York City, Washington D.C., and Pennsylvania.
The election of Barack Obama as the first African American President of the United States.
The passage of the Affordable Care Act, also known as Obamacare, which expanded access to health care for millions of Americans.
The legalization of same-sex marriage in all 50 states by the U.S. Supreme Court.
The Women's March, a global protest in response to the inauguration of President Donald Trump and his policies.
The COVID-19 pandemic, which resulted in widespread illness, death, and economic disruption.
The Black Lives Matter protests, a movement against police brutality and systemic racism that was sparked by the killing of George Floyd in Minneapolis.
The planned opening of the Obama Presidential Center in Chicago, Illinois, which will serve as a museum and public space dedicated to the legacy of Barack Obama.