In an effort to gain an advantage near Saint-Mihiel, U.S. planners including Arthur L. Conger attempted to deceive the Germans into believing the American attack would come at Belfort, 180 miles to the south. False orders left where spies or informants could find them and staff officer reconnaissance activity created the appearance that the U.S. intended to conduct operations in and around Belfort. Pershing gained surprise at Saint-Mihiel and his offensive was successful. In 1926, Conger discovered from a former German officer that while the "Belfort Ruse" had not been completely successful, it had aided Pershing. Concerned that an Allied attack in the Belfort area was at least a possibility, many German units that could have reinforced German lines in the Saint-Mihiel area delayed movement from their rear area positions near Saint-Mihiel until it was too late. As a result of the success of Pershing's offensive, they did not have time to execute their withdrawal plans, and either abandoned their weapons and fled or were taken as prisoners.