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.
Two years later came the Northwest Ordinance of 1787. This ordinance provided land in the Great Lakes and Ohio Valley regions for settlement. (It eventually broke into five states: Michigan, Indiana, Wisconsin, Ohio, and Illinois).wo years later came the Northwest Ordinance of 1787. This ordinance provided land in the Great Lakes and Ohio Valley regions for settlement. (It eventually broke into five states: Michigan, Indiana, Wisconsin, Ohio, and Illinois).