Tuhia tētahi tohutoro mō tēnei wāhanga - I uru atu ia ki te ope taua o te Kotahitanga hei hoia takitahi i roto i te Rōpū E o te 49th New York Volunteer Infantry i te marama o Hune, 1861, i eke ai ki te tūranga o te kaitiaki. I uru tana roopu ki nga pakanga a te Army of the Potomac, tae atu ki te Young's Mill, Yorktown, Williamsburg, Mechanicsville, Fair Oaks
, Gaines's Mill, Savage's Station, Malvern Hill, Tuarua Bull Run, Maunga ki te Tonga, Antietam, Fredericksburg, Williamsport, Gettysburg, Mine Run, Wilderness, Cold Harbor, Petersburg me etahi atu. I mauheretia a Walsh i roto i nga mahi ki te Welden Railroad i mua tata atu i te paunga o tana wa whakauru, a he herehere ia i Belle Isle, Libby Prison, Andersonville, Savannah, Castle Pinckney me Florence Stockade, i mua i te whakawhiti me te hoki ki Annapolis, Indiana, i reira i tukuna ai ia i te Mei 5, 1865. I etahi wa i muri mai i tenei, e waru nga tau i mahi ia i te "Wisconsin State Journal" i Madison.