But these acts of Congress were far more easily passed than enforced. In the first place, even before the land north of the Ohio was purchased by the United States, white settlers began crossing the Ohio and settling on the "Indian Side." By the year 1780 the Indian Side of the river had been quite wrested from the savages, at least from Pittsburg down to the Scioto. Mclntosh had built Fort Laurens on the Tuscarawas and, with the help of others, the Delawares had been driven from the Muskingum Valley. Clark had captured Illinois and it was now a part of Virginia. Many invasions from Kentucky had passed up the Scioto and the Miamis, In all these campaigns the soldiery was largely made up of the border settlers of western Pennsylvania and Virginia, and they somehow conceived the notion that they were as much entitled as any one to the splendid lands from which they had driven the Indians. Heretofore the states and the Government had done everything in reason to encourage the western movement and protect it. No one perhaps realized that the Ohio River was to be considered, in any sense, a boundary line. Yet the United States recognized the Indian right and took such means as were possible to accomplish an utterly impossible thing. The lands on the northern side of the Ohio River were to be preserved to the Indians until purchased from them. It was even decreed that retaliatory raids of the whites should not cross the Ohio. As early as 1779 "trespassers" of a law as inherently impossible as the Proclamation of 1763, made settlements on the Indian Side of the Ohio "from the river Muskingum to Fort Mclntosh, and thirty miles up some of the branches of the Ohio river."[36] Colonel Brodhead at Fort Pitt immediately despatched Captain Clark to drive off the intruders. The commissioners at the Fort Mclntosh treaty (1785) were not blind to such possibilities, and took occasion to forward the following instructions to Colonel Harmar at Fort Pitt, January 24, 1785: "Surveying or settling the lands not within the limits of any particular State being forbid by the United States, in Congress assembled, the commander will employ such force as he may judge necessary in driving off persons attempting to settle on the lands of the United States."[37] The task laid upon Colonel Harmar was a most unpopular and impossible one. By this time the country south of the Ohio was teeming with a great restless population.