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.
History Westward Expansion. With much of the east coast of America already developed, the United States government wanted to encourage people to move out west. They decided to help people out by offering them free land through a law called the Homestead Act.A New Law.ith much of the east coast of America already developed, the United States government wanted to encourage people to move out west. They decided to help people out by offering them free land through a law called the Homestead Act.