Commissioned by President Thomas Jefferson, the Lewis and Clark expedition (1804-1806) aimed to explore the newly acquired Louisiana Territory and find a practical route to the Pacific Ocean.
Capitalism is an economic system where trade and industry are controlled by private owners for profit, rather than by the state.
The Articles of Confederation were adopted by the Continental Congress in 1777 and served as the first constitution of the United States until the current U.S. Constitution was adopted in 1787.
The Civil War began on April 12, 1861, when Confederate forces attacked Fort Sumter in Charleston, South Carolina.
The judicial branch, headed by the Supreme Court, interprets the laws and ensures they are applied correctly according to the Constitution.
