Scales again served with distinction during the Battle of Chancellorsville in May 1863, where he was wounded in the thigh, continuing on the field until loss of blood forced him to leave. It was to his regiment that General Pender said, "I have nothing to say to you but to hold you all up as models in duty, courage and daring." In his official report Pender referred to Colonel Scales as "a man as gallant as is to be found in the service."