Illinois in the American Revolution
George Rogers Clark arrived at Fort Massac on June 30, 1778, with about 175 men, under orders from Virginia to capture the British outposts in Illinois. British failure to regarrison the old French fort here enabled Clark to enter the Illinois country without opposition. The British at Kaskaskia expected an attack from the Mississippi River. By marching overland Clark surprised them. He arrived at Kaskaskia on the night of July 4-5, and quickly secured the fort without resistance.
Marker is on Park Road south of East 5th Street (U.S. 45), on the right when traveling east.
Courtesy hmdb.org