Westward Expansion DescriptionsVersion en ligne Descriptions to territories par Matthew Fosse 1 Gained from Spain in exchange for $5 million in land claims owed 2 Territory gained after winning the Revolutionary War 3 Original United States that declared independence 4 Bought from France for $15 Million 5 Split with Great Britain at the 49th parallel 6 Taken from Mexico after victory in the Mexican-American War, paid Mexico $15 million 7 Annexed after 9 years of wanting to join the United States 8 Bought for $10 million from Mexico to build a railroad that would never be built