id author title date pages extension mime words sentences flesch summary cache txt en-wikipedia-org-5374 Economic history of the United States - Wikipedia .html text/html 42609 3946 69 Although cotton was grown in India, China, Egypt, the Middle East and other tropical and subtropical areas, the Americas, particularly the U.S., had sufficient suitable land available to support large scale cotton plantations, which were highly profitable.[82] A strain of cotton seed brought from Mexico to Natchez, Mississippi in 1806 would become the parent genetic material for over 90% of world cotton production today; it produced bolls that were three to four times faster to pick.[83]:114The cotton trade, excluding financing, transport and marketing, was 6 percent or less of national income in the 1830s.[84] Cotton became the United States' largest export. The Union economy grew and prospered during the war while fielding a very large army and navy.[185] The Republicans in Washington had a Whiggish vision of an industrial nation, with great cities, efficient factories, productive farms, all national banks, all knit together by a modern railroad system, to be mobilized by the United States Military Railroad. ./cache/en-wikipedia-org-5374.html ./txt/en-wikipedia-org-5374.txt