- FROM PHILIPSBURG TO YORKTOWN: How a Six-Week Encampment Changed the War A presentation by Dr. Iris de Rode, featured in Ken Burns’s upcoming PBS documentary The American Revolution. In the summer of 1781, George Washington and the French General Rochambeau spent six critical weeks at the Philipsburg Encampment—a vast joint military camp in today’s Greenburgh where the French and American armies finally united and operated side-by-side for the first time—and at Rochambeau’s headquarters at toda