By the mid-1800s, Americans began to dream of extending their territory to the Pacific Ocean. Eventually, that dream came true.

First, the United States secured the Pacific Northwest by signing a treaty with Britain. Next, after American settlers declared independence from Mexico, the United States brought Texas into the Union. Americans then won California and the Southwest by fighting a war with Mexico. As settlers poured into the Southwest, a new culture developed that blended American, Mexican, and Indian cultures.

Additional Activities

• "Why Study History?" Activity: Have students use the Internet to gather information about a historic site. (See Teacher's Edition, page 353.)
  
  
• Check out the Student Internet Activities, which focus on the early history of the Mormons and National Parks.
  
  

Section 1: Oregon Country

Section 2: Texas Wins Independence

Section 3: California and the Southwest

Section 4: War With Mexico

Section 5: A Rush to the West