In April of 1861, at the beginning of the Civil War, the United States Army was formed by only 16,000 professional men and many soldiers and officers from the southern states resigned to become part of it. of the Confederate Army that began to organize the nascent Confederate States of America (or Confederation). The Army of the Union was composed of ten infantry regiments, four of artillery, two of cavalry, and one of mounted infantry. These regiments were scattered extensively throughout the territory. Of the 197 companies in the military, 179 occupied isolated positions in the west and the remaining 18 served in garrisons east of the Mississippi River, mostly along the Canadian border and on the Atlantic coast.
