Tariff
A tariff is a tax on imports or exports between sovereign states. It is a form of regulation of foreign trade. It is a policy that taxes foreign products to encourage or protect domestic industry. It helps limit trade deficits. The tariff is historically used to protect infant industries and to allow import substitution industrialization.
Tariff in United States history
With tariffs providing the basic federal revenue, an embargo on trade, or an enemy blockade, would threaten havoc. This happened in connection with the American economic warfare against Britain in the 1807–15 period. In 1807 imports dropped by more than half and some products became much more expensive or unobtainable. Congress passed the Embargo Act of 1807 and the Non-Intercourse Act (1809) to punish British and French governments for their actions; unfortunately their main effect was to reduce imports even more. The War of 1812 brought a similar set of problems as U.S. trade was again restricted by British naval blockades. The fiscal crisis was made much worse by the abolition of the First Bank of the U.S., which was the national bank. It was reestablished right after the war.
The lack of imported goods relatively quickly gave very strong incentives to start building several U.S. industries in the Northeast. Textiles and machinery manufacturing plants especially grew. Many new industries were set up and run profitably during the wars and about half of them failed after hostilities ceased and normal import competition resumed. Industry in the U.S. was advancing up the skill set, innovation knowledge and organization curve as they adapted to the Industrial Revolution's new machines and techniques.