Final answer:
Before the War of 1812, the U.S. military was small and underfunded, facing a vastly superior British force. Post-war, the U.S. experienced economic growth and technological advances, contributing to a stronger military and national identity. The market revolution and westward expansion were significant outcomes.
Step-by-step explanation:
Comparing and contrasting the U.S. military strength before and after the War of 1812 reveals significant changes. Prior to the war, the U.S. military faced several challenges. The British military superiority was evident; the American army had been reduced as a cost-cutting measure under Jefferson and the navy consisted of fewer than 20 warships. Moreover, the lack of a national bank made funding for the war difficult.
After the War of 1812, the U.S. underwent major social and economic transformations leading to a market revolution. This growth led to advances in manufacturing and technology, such as interchangeable parts and the integrated mill, which also likely contributed to strengthening the military indirectly. The war generated a surge of national pride and American identity, separate from Britain, and the U.S. turned its attention to expansion in the West.