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At first, the American war effort faced financial difficulties. In 1842, the government, in an effort to protect growing American industries and, as Southerners would say, to force them to buy eastern goods, set a high tariff on imports. While the tariff was successful in stifling foreign competition, it also drastically reduced government revenues and put severe limitations on the extension of international credit to American entrepreneurs. Coupled with currency inflation and a slowing of the business cycle, the United States Treasury was hard put to finance a war. At the beginning of hostilities, the treasury held only a small surplus of $7 million. When Polk recommended that the Congress place additional taxes on coffee and tea, the House of Representatives indignantly refused. Polk, however, was able to have passed a new bill lowering tariffs, and by the beginning of 1847 revenues began to increase. The Congress also voted to issue $10 million in new Treasury notes and bonds. Technical
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Douglas V. Meed (The Mexican War 1846–1848 (Essential Histories series Book 25))