USA HISTORY

Detailed explanation-1: -The territory nominally remained under Spanish control, until a transfer of power to France on November 30, 1803, just three weeks before the formal cession of the territory to the United States on December 20, 1803.

Detailed explanation-2: -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. For roughly 4 cents an acre, the United States doubled its size, expanding the nation westward.

Detailed explanation-3: -On October 1, 1800, within 24 hours of signing a peace settlement with the United States, First Consul of the Republic of France Napoleon Bonaparte, acquired Louisiana from Spain by the secret Treaty of San Ildefonso.

Detailed explanation-4: -French explorer Robert Cavelier de La Salle first claimed the Louisiana Territory, which he named for King Louis XIV, during a 1682 canoe expedition down the Mississippi River.