About NCMA. NCMA is the national trade association representing the producers and suppliers of concrete masonry products, including concrete block, manufactured stone veneer, segmental retaining walls and articulating concrete block. For over 100 years, the Associationâs mission remains to advance, protect and promote the common interests of its members.
Between 1803 and 1853, the United States almost tripled in size. In the early 1800s, the land west of the United States was very undeveloped.
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.