Rubuta ci gaba ga wannan sakin layi - Ya koma kungiyar Sojojin Tarayya, jim kadan bayan haka, lokacin da kungiyar ta bukaci karin maza. Bayan da ya tayar da kuma shirya Kamfanin Kasuwanci na 7 na Ohio Sharpshooters, an ba Squire kwamishinan kwamishinan a 1862. Ya yi aiki tare da Bakwai na Ohio Sharpshooters har zuwa 1865. A lokacin yakin basasa, Squire ya shiga cikin yakin Nashville, Chickamauga, Resaca
, da kuma Missionary Ridge. A lokacin yakin neman zabe na karshe, "Squire ya yi aiki a matsayin mai ba da shawara ga kotun kotu. Daga bisani Squire ya zama mai ba da shawara ga gundumar Tennessee, "tare da hedkwatar a Nashville. "Ya yi aiki a ma'aikatan Manjo Janar Rousseau a matsayin mai ba da shawara ga alƙali kuma a ƙarƙashin Manjo Janar Thomas a lokacin kewaye da yaƙin Nashville". A shekara ta 1865, an sallame shi da mukamin kyaftin din kuma daga baya ya zama babban jami'in, laftanan-kolonel, da kuma colonel.