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Benjamin Tallmadge was an officer in the Continental Army during the American Revolutionary War. Although he fought in some important battles, he is best known for organizing and leading the Culper Spy Ring, which gathered intelligence for General George Washington. Tallmadge also played a key role in uncovering the Treason of Benedict Arnold.

Key facts about the Tariff of 1828.

Also known as the Tariff of Abominations, the Tariff of 1828, prompted U.S. Vice-president John C. Calhoun to anonymously pen his Exposition and Protest, which invoked the doctrine of nullification in challenging the Constitutionality of the act.

Key facts about the Tariff of 1832.

The Tariff of 1832 was an attempt to address Southern grievances over the high protective duties imposed by the Tariff of 1828. Hostility toward the new tariff in South Carolina nearly led to civil war.

Key facts about the Tariff of 1833.

Approved by Congress on March 1, 1833 and signed by President Andrew Jackson the next day, the Tariff of 1833 was a compromise measure brokered by Senators Henry Clay and John C. Calhoun as part of a successful effort to resolve the Nullification Crisis of 1832-33.

The son of United States President Zachary Taylor, Richard Taylor was a prominent Confederate general in the Eastern and Western theaters of the American Civil War

Key facts about Richard Taylor, a prominent Confederate general in the Eastern and Western theaters of the American Civil Warthe who son of United States President Zachary Taylor,

Hero of the Mexican-American War, 12th U.S. President Zachary Taylor served only sixteen months in office before dying in the White House on July 9, 1850.

Key facts about Zachary Taylor, twelfth President of the United States.

Key facts and important details about the Tea Act of 1773 for kids doing research and students studying for the AP U.S. History (APUSH) exam.

On May 10, 1773 the British Parliament enacted the Tea Act of 1773.

The Headright System was established by the Virginia Company in 1618 as a way to increase immigration to Virginia and increase the workforce.

The 13th Amendment to the U.S. Constitution achieved ratification by the states on December 6, 1865. The amendment abolished the practice of slavery in the United States — except as a punishment for a crime — and provided Congress with broad powers to ensure the enforcement of the amendment.

Key fact about the Thirteenth Amendment to the U.S. Constitution.

Major General George Henry Thomas was a prominent Union general who served primarily in the Western Theater of the American Civil War.

Key facts about Union General George H. Thomas.

The Battle of Thoroughfare Gap took place on August 28, 1862, during the Civil War. Confederate forces won the battle, allowing the reunification of the Army of Northern Virginia during the Northern Virginia Campaign, which helped ensure a Confederate victory at the Second Battle of Bull Run.