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.
This massive transfer of land included all of present-day Arkansas, Oklahoma, Missouri, Kansas, Nebraska and Iowa; most of Colorado, South Dakota, Montana and Wyoming, as well as significant parts of North Dakota, Minnesota, Texas and Louisiana. Parts of it also extended into what is now Canada for a short period of time.