During the years following the Civil War

Historical marker location:

1275 25th Street Northwest, West End, District of Columbia

( Marker is at the intersection of N Street Northwest and 25th Street Northwest on N Street Northwest.)

Dupont Circle. Diverse Visions | One Neighborhood

April 12, 1861: The Civil War begins with the Confederate attack on Fort Sumter, located in South Carolina's Charleston Harbor.
April 15, 1861: President Abraham Lincoln issues a call for 75,000 volunteers to serve in the Union Army to suppress the rebellion.
May 24, 1861: The first major land battle, known as the First Battle of Bull Run (or First Battle of Manassas), takes place in Virginia. It ends in Confederate victory.
September 17, 1862: The Battle of Antietam in Maryland becomes the bloodiest single-day battle in American history, with heavy casualties on both sides. The Union forces, commanded by General George McClellan, manage to halt Confederate General Robert E. Lee's advance into Union territory.
January 1, 1863: President Lincoln issues the Emancipation Proclamation, declaring that all slaves in Confederate-held territories are to be set free. However, the proclamation does not immediately free all slaves in the United States.
July 1-3, 1863: The Battle of Gettysburg in Pennsylvania takes place, resulting in a significant Union victory and inflicting heavy casualties on Confederate forces. It marks a turning point in the war.
November 19, 1863: President Lincoln delivers the Gettysburg Address, emphasizing the principles of liberty, equality, and the preservation of the Union.
April 9, 1865: General Robert E. Lee surrenders to Union General Ulysses S. Grant at Appomattox Court House in Virginia, effectively ending the Civil War.
April 14, 1865: President Lincoln is assassinated by John Wilkes Booth while attending a play at Ford's Theatre in Washington, D.C.
May 10, 1865: Confederate President Jefferson Davis is captured, signaling the collapse of the Confederate government.
December 6, 1865: The Thirteenth Amendment to the United States Constitution is ratified, officially abolishing slavery throughout the country.

While this timeline provides an overview of key events, it is important to note that the Civil War spanned over four years, from 1861 to 1865, and encompassed numerous battles, campaigns, and political developments that shaped the course of American history.

The city was built on a swamp: The area that is now Washington, D.C. was originally a swampy, marshy region along the Potomac River. The construction of the city involved extensive drainage and landfill projects to make the land suitable for building.