Fifty years later (1810) the American industrial revolution was under way. Samuel Slater, twenty years before, had introduced the factory system into the United States. The repressive commercial measures of Great Britain in her Orders in Council (1806 and 1807) and the edicts of Napoleon (1806 and 1807) had turned enormous quantities of American capital and thousands of laborers from com merce and agriculture to manufactures. Our own Embargo Act (1807) and Non-Intercourse Act (1809) had practically completed what the two great European powers had begun - the industrial isolation of the United States. The three years' war with Great Britain (1812-1814) further encouraged manufactures by providing them a government market. Thus, by 1816, when the first tariff law for the protection of American manufacturers was enacted, the American industrial revolution was an established fact. In comparing these two great industrial revolutions, it must be kept clearly in mind that the one in England was characterized by a change from home to factory methods, while the one in the United States was characterized by a change from commerce and agriculture to manufacturing.