Terms in this set (5) What were the major factors contributing to US expansion in the 1840's? Territorial expansion happened as a result from war with Mexico and international disputes; treaties were made that required more land.
What does this map reveal about the U.S. railroad network in the 1850s? - The North had the highest concentration of railroad mileage in the United States. - Four trunk lines linked eastern industrial centers with western farming and commercial centers.
What does this map reveal about the U.S. railroad network in the 1850s? Correct Answers: -The North had the highest concentration of railroad mileage in the United States. -Four trunk lines linked eastern industrial centers with western farming and commercial centers.
