He was amazingly successful. His men had no camps. To have had definite headquarters would have been to invite certain destruction or capture. When too hotly pursued, they scattered over the friendly countryside, hiding in the hills, the woods, farmhouses or barns and often, if discovered, appearing as working farmers. "They would scatter for safety" says Mosby, "and gather at my call, like the Children of the Mist." Their attacks frequently were made at night; but whether by day or night so unexpectedly as always to utterly confuse their foes and keep them in such nervous anticipation of attack at unknown and unpredictable points that Mosby became to them a major scourge. Branded as "guerilla," "bushwhacker," and "freebooter," Mosby stoutly and logically maintained that his method of fighting was wholly within the rules of war and when General Custer took some of his men prisoners and hanged them as thieves and murderers, Mosby, acting on Lee's instructions, promptly retaliated by hanging an equal number of Custer's men as soon as he was able to capture them. That appears to have ended the execution of captured Mosby men, save for rare individual and heinous offences. One of the most spectacular and, upon the local imagination, lastingly impressive forays made by him was the so-called "Greenback Raid" in which, on the 14th October, 1864, his men wrecked a Baltimore and Ohio train near Brown's Crossing. Among the passengers were two Federal paymasters, carrying $168,000 in United States currency. This was seized by Mosby's men, carried to Bloomfield in Loudoun, and divided among the raiders, each receiving about $2,000. It is related that thenceforth, until the end of the war, there was ample Federal currency circulating in Loudoun.