Dee ihe ọzọ maka paragraf a - Mgbe Agha Obodo America tiwapụrụ, Jones ji obi ya nile sonye n'Òtù Ndị Agha Union. Na Julaị 7, 1861, ọ debanyere aha ya na ndị ọrụ afọ ofufo 37th New York, nke a maara nke ọma dị ka "Irish Rifles", n'okpuru Ọchịagha John H. McCunn. Na mbido ọ bụ onye nkịtị mana ọ hụrụ onwe ya ka ndị nwoke nọ na ndị agha ahụ họpụtara ya ka ọ bụrụ onye isi nke abụọ. Ọ nọ na Agha Mbụ nke Bull Run, naanị izu abụọ mgbe ọ debanyere aha ya, mana ọ hụghị ihe ọ bụla ka edobere ya na nchekwa. Jones gosipụtara "omume obi ike" n'afọ ndị mbụ ya na ndị agha ahụ ma n'oge na-adịghị anya ọ rịgoro n'ọkwa onye isi ndị agha na onye enyemaka na November 4, 1861, na mgbe ahụ isi na Jenụwarị 21, 1862. Ya na "Irish Rifles" mechara sonye na General Samuel P. Heintzelman's III Corps, dịka akụkụ nke 3rd Brigade nke 3rd Division n'okpuru Brigadier General Philip Kearny, n'oge mkpọsa Peninsula ma sonye na Williamsburg, Seven Pines
na mkpọsa ụbọchị asaa. Jones nọkwa mgbe ndị 37th New York Volunteers, mgbe ahụ etinyere na 3rd Brigade nke 1st Division nke III Corps, nọ na Agha nke Abụọ nke Bull Run. N'ọnwa Mee na Juun, ọ malitere ịrịa ịba ma nọrọ n'ụlọ ọgwụ na Washington, D.C. na Septemba 26 nọrọ ebe ahụ ruo ngwụcha Ọktoba. Ọ bụkwa nwa oge onye isi ndị isi ndị isi Franz Sigel tupu ezumike nka nke General Ambrose Burnside na nhazi nke ndị agha nke Potomac.