USA HISTORY

Detailed explanation-1: -Westward expansion began in earnest in 1803. Thomas Jefferson negotiated a treaty with France in which the United States paid France $15 million for the Louisiana Territory – 828, 000 square miles of land west of the Mississippi River – effectively doubling the size of the young nation.

Detailed explanation-2: -On July 4, 1803, the treaty was announced, but the documents did not arrive in Washington, D.C. until July 14. The Louisiana Territory was vast, stretching from the Gulf of Mexico in the south to Rupert’s Land in the north, and from the Mississippi River in the east to the Rocky Mountains in the west.

Detailed explanation-3: -In this transaction with France, signed on April 30, 1803, the United States purchased 828, 000 square miles of land west of the Mississippi River for $15 million.

Detailed explanation-4: -As the United States spread across the Appalachians, the Mississippi River became an increasingly important conduit for the produce of America’s West (which at that time referred to the land between the Appalachians and the Mississippi).