History: American Old West, United States

The price was $15 million (about $0.04 per acre), including the cost of settling all claims against France by American citizens. The purchase was controversial. Many of the Federalist Party, the dominant political party in New England, thought that the territory was "a vast wilderness world which will... prove worse than useless to us" and spread the population across an ungovernable land, weakening federal power to the detriment of New England and the Northeast. But the Jeffersonians thought the territory would help maintain their vision of the ideal republican society, based on agricultural commerce, governed lightly and promoting self-reliance and virtue.
Jefferson quickly ordered exploration and documentation of the vast territory. He charged Lewis and Clark to lead an expedition, starting in 1804, to "explore the Missouri River, and such principal stream of it, as, by its course and communication with the waters of the Pacific Ocean; whether the Columbia, Oregon, Colorado or any other river may offer the most direct and practicable communication across the continent for the purposes of commerce". Jefferson also instructed the expedition to study the region's native tribes (including their morals, language, and culture), weather, soil, rivers, commercial trading, animal and plant life.
The principal commercial goal was to find an efficient route to connect American goods and natural resources with Asian markets, and perhaps to find a means of blocking the growth of British fur trading companies into the Oregon Country. Asian merchants were already buying sea otter pelts from Pacific coast traders for Chinese customers. An expansion of inland fur trading was also anticipated. With news spreading of the expedition's findings, entrepreneurs like John Jacob Astor immediately seized the opportunity and expanded fur trading operations into the Pacific Northwest. Astor's "Fort Astoria" (later Fort George), at the mouth of the Columbia River, became the first permanent white settlement in that area. However, during the War of 1812, the rival North West Company (a British-Canadian company) bought the camp from Astor's agents as they feared the British would destroy an American camp. For a while, Astor's fur business suffered. But he rebounded by 1820, took over independent traders to create a powerful monopoly, and left the business as a multi-millionaire in 1834, reinvesting his money in Manhattan real estate.