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William Dawes was a member of the Sons of Liberty and the first rider sent by Joseph Warren on the night of April 18, 1775, to warn Samuel Adams and John Hancock that the British were marching to Lexington and Concord. Dawes went on to serve in the Continental Army during the American Revolutionary War.

Drafted by Thomas Jefferson, and edited by luminaries such as Benjamin Franklin and John Adams, the Declaration of Independence was adopted by the Second Continental Congress on July 4, 1776.

The Declaration of Independence was drafted by Thomas Jefferson between June 11 and June 28, 1776.

William Dennison, Jr. was the twenty-fourth Governor of Ohio, serving from January 9, 1860 through January 13, 1862. Dennison also served as Postmaster General of the United States from 1864 to 1866.

Key facts about William Dennison, Jr. who was the twenty-fourth Governor of Ohio and Postmaster General of the United States from 1864 to 1866.

John Dickinson was a Founding Father, known as the "Penman of the Revolution" for his Letters from a Farmer in Pennsylvania. Although he refused to sign the Declaration of Independence, his name was signed to the United States Constitution.

The Dominion of New England was created in 1686 to bring several colonies under the more direct control of the English Crown.

Abner Doubleday was a career military officer and prominent Union general in the Eastern Theater of the American Civil War.

Key facts about Abner Doubleday who was a career military officer and prominent Union general in the Eastern Theater of the American Civil War.

Stephen Douglas was a prominent Congressman and Senator from Illinois, He supported Manifest Destiny and Popular Sovereignty and helped pass the Compromise of 1850 and the Kansas-Nebraska Act of 1854. In 1858, he participated in a series of public debates with Abraham Lincoln.

Important facts about Stephen A. Douglas, a three-term United States Senator who championed popular sovereignty and was influential in the enactment of the Compromise of 1850 and the Kansas-Nebraska Act of 1854.

After escaping from bondage on September 3, 1838, Frederick Douglass became a highly-acclaimed orator and writer supporting the abolition of slavery before the Civil War and the enactment of African American rights during Reconstruction.

Key facts about escaped slave and famous abolitionist Frederick Douglass.

Key facts about the Dred Scott v. Sandford U.S. Supreme Court case.

Dred Scott v. Sandford was a historic ruling by the United States Supreme Court that declared that people of African descent, were not citizens of the United States, and that Congress had no Constitutional authority to regulate slavery in U.S. territories.

Eliphalet Dyer was a lawyer, politician, and judge from Connecticut. He was a delegate to the Stamp Act Congress, the First Continental Congress, the Second Continental Congress, and the Confederation Congress. He also served in the French and Indian War.

Jubal Anderson Early was a prominent Confederate general during the American Civil War. His Army of the Valley battled Ohioan and Union General Philip Sheridan's force for control of Virginia's Shenandoah Valley in 1864 and early 1865.