Achondroplasia is one of the most common types of dwarfism. Learn about its causes, diagnosis, and treatment. Achondroplasia is one of the most common types of dwarfism.
Westward Expansion (1807-1912) The Surge West. Summary. The westward movement of the American population occurred in intermittent flurries of settlement. The first began early in the nation's history, resulting in the statehood of Vermont, Kentucky, Tennessee, and Ohio, all of which were admitted to the Union between 1791 and 1803.
1 Westward Expansion had a large impact on the Civil War. 2  The South wanted western states to be slave states while the North wanted slavery to be illegal in the new states. 3  Westward Expansion by Dale Anderson. 4  2001.