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Rh On January 31, 1786, a treaty was concluded at the mouth of the Great Miami with the Shawanese. The United States received from that dangerous nation a title to the lower Ohio Valley. But the general government was by this time at its wits' end to keep the acquired territory from the restless inhabitants of its own impoverished colonies. Colonel Harmar wrote the Secretary of War now that he had, by force of arms, driven off all intruders for a distance of seventy miles below Pittsburg, but that the number beyond "was immense" and that nothing could prevent the lands being occupied in the old Virginia way "unless Congress enters into immediate measures." Congress took the cue and resolved that if troops stationed at Pittsburg could not enforce its commands, a new garrison must be established on the lower Ohio. Accordingly Colonel Harmar was ordered to take post on the north side of the Ohio between the Muskingum and the Miami Rivers, where he could successfully keep the front ranks of the immigration army from crossing the river, and where he could also protect the surveyors of the seven ranges