On December 20, 1803, the biggest land deal in history took place when the United States led by Thomas Jefferson purchased 831,321 square miles of land from France. The Louisiana Purchase cost the United States fifteen million dollars and more than doubled the size of the United States.

How much do you know about the American Industrial Revolution? Test your knowledge of the Industrial Revolution with this quiz. Good luck!

• Overview of the Industrial Revolution
• Industrial Revolution Inventors and Inventions
• Invention of the Steam Engine

Two years after Abraham Lincoln's Emancipation Proclamation, the 13th Amendment was created. This Amendment to the Constitution abolished slavery throughout the entire United States and not just areas under Union control.

On December 11, 1941, the United States declared war on Italy and Germany to start its involvement in the European theater during World War II. It had already declared war on Japan on December 8, 1941 in response to the bombing of Pearl Harbor. Germany had been fighting against the Allies for a little over three years prior to US involvement. Learn more about World War II.