Dee ihe ndị ọzọ dị na paragraf a - Sneden hapụrụ Brooklyn na 1861 iji banye n'òtù ndị agha New York Volunteer Infantry Regiment nke 40, ma ọ bụ "Mozart Regiment", nke ndị agha Potomac. O jere ozi dị ka onye na-elekọta ụlọ mgbe ndị agha ya mara ụlọikwuu na nso Leesburg Turnpike. Malite na Jenụwarị 12, 1862, Sneden jere ozi na ndị ọrụ nke Samuel P. Heintzelman nke III Corps, na mbụ, dị ka onye na-ese ihe na ọrụ map, emesịa, dị ka injinia topographical. Na Machị 22, 1862, Sneden so Heintzelman banye n'agha Peninsula, na-ekere òkè na Agha Williamsburg, Agha nke Pines asaa, Agha nke Savage's Station
, na Agha Glendale. Mgbe ọ laghachiri Northern Virginia, o sonyere na Agha nke Abụọ nke Bull Run. E kenyere ya ọrụ ichebe Washington, D.C., nke mbụ na Alexandria, Virginia, mgbe ahụ na Arlington House.