...without any military protection, but at the time we were there General Couch was encamped at Mercersburg, sixteen miles distant, with a battery and a force of men, and General Averill was encamped at Greencastle , ten miles distant, with 2,500 cavalry. Why did they permit us to burn Chambersburg? This is a question that has never been solved. They had three men to our one, as our force, all told, did no...