What was the largest industry by the late 1800

The rise of American industry

Explanation:

During the first 30 years of the 1800s, AMERICAN INDUSTRY was truly born.

Household manufacturing was almost universal in colonial days, with local craftsmen providing for their communities. This new era introduced FACTORIES, with machines and predetermined tasks, producing items to be shipped and sold elsewhere.

the mexican-american war was a conflict between the united states and mexico, fought from april 1846 to february 1848.

eliminate individuals who opposed his rule