The British had been helping and encouraging Indian raids at this time in Kentucky, along the border settlements of Virginia and in the Illinois area. Clark believed that the Illinois area rightfully belonged to Virginia and felt that it must be conquered in order to attain peace for the Virginia settlers. The reports of official observers convinced him that this land could be invaded and captured with little effort. He returned to Williamsburg to get Governor Henry's approval for this objective and was happy to be commissioned to raise several companies of soldiers to be used in the invasion of the Illinois territory. Clark obtained his troops, and, after traveling north through Virginia and then westward to the Ohio River, they floated down the Ohio River on rafts and in boats. They landed near Louisville on the northern bank of the Ohio and marched westward approximately two hundred miles to Fort Kaskaskia. On July 4, 1778, they captured Fort Kaskaskia and its leader, Colonel Henry Hamilton. Marching another 150 miles northeastward, on February 25, 1779 they captured Fort Vincennes on the banks of the Wabash River. The post of Cahokia was also captured. In honor of his great bravery and extremely difficult marching, Clark was entitled the "Hannibal of the West." This entire area was known as the Northwest Territory, and these conquests of Clark and his troops gave Virginia complete claim for the control of this area as part of the Virginia state at the end of the American Revolution in 1783. Without such conquests, England would undoubtedly have held this territory after the Revolution, and it would probably have been an important part of Canada today. Simultaneously, the capture of these forts reduced the danger of Indian attacks considerably. When the city of Philadelphia was about to be occupied by British troops on September 18, 1777, the famous Liberty Bell was taken from the State House in Pennsylvania for safekeeping. It was camouflaged with the heavy baggage of the American army in a supply train of 700 wagons and was carefully guarded by two hundred Virginian and North Carolinian cavalry-mounted troops. It was hidden in the Zion Church in Allen town, Pennsylvania, until June 27, 1778 when it was returned to its tower in Independence Hall.