The last battle associated with War of 1812 was fought in New Orleans, although the final outcome of the War was practically a "draw" between the British and American forces.
Explanation:
It created jobs for workers, contributed to the wealth of the nation, increased the production of goods, which eventually lead to a raised standard of living, healthier diets, better housing, cheaper mass-produced clothing, higher wages, shorter hours, and better working conditions after labor unions were formed.
B. Hydroelectric.
(Edit: Why did you ask the question if you had the answer?)