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.
Confidence votes 15.1K. Manifest Destiny was the term used to describe the idea in the United States, beginning in the 1840s, that the US was destined to expand from ocean to ocean and all of North America from north to south. It developed, in part, from a great surge of nationalism (patriotism) following the War of 1812, as the nation expanded west.