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.
Republican legislation passed in Congress after Southerners left: banking, tariff, homestead, railroad: After the South seceded, northerners in Congress enacted legislation such as the Pacific Railroad Act authorizing a transcontinental railroad and the Homestead Act granting free land in the west.