USA HISTORY

Detailed explanation-1: -The Mississippi River Delta Basin is defined as all of the land and shallow estuarine area between the two northernmost passes of the Mississippi River and the Gulf of Mexico. The basin is located in Plaquemines Parish, Louisiana, south of the city of Venice.

Detailed explanation-2: -The Louisiana Territory under Spanish and French rule The Louisiana Territory had been the object of Old World interest for many years before 1803. Explorations and scattered settlements in the 17th and 18th centuries had given France control over the river and title to most of the Mississippi valley.

Detailed explanation-3: -Great Plains: Grassland region of North America between the Rocky mountains and the Mississippi river.

Detailed explanation-4: -The first people to live in the the west were Native American tribes, each with its own culture. The Spanish were the first Europeans to arrive in the region. After the purchase of the Louisiana territory from France in 1803, the land between the Mississippi River and the Rocky Mountains belonged to the United States.