There were twenty-four
regiments in the Corps. These regiments were organized into one division and three brigades. In the beginning, each regiment was made up of six
companies of the First Battalion and four of the Second Battalion, but in the latter part of the war, this method of organization was not strictly adhered to. The 18th Regiment, for example, which rendered exceptionally good service in
Virginia at
Belle Plain,
Port Royal, and White House Landing in the spring and early summer of 1864, and in or near Washington DC in the latter part of the summer and through the fall of that year, was made up of only six Second Battalion companies. There were from two to three times as many men in the First Battalion as in the Second, and the soldiers in the First Battalion performed a wide variety of duties. They furnished guards for the Union
prison camps at
Johnson's Island,
Ohio,
Elmira, New York,
Point Lookout, Maryland, and elsewhere. They furnished details to the
provost marshals to arrest
bounty jumpers and to enforce the
draft. They escorted substitutes, recruits, and prisoners to and from the front. They guarded railroads, did patrol duty in
Washington DC, and even manned the defenses of the city during
Jubal Early's raid against
Fort Stevens in July 1864. During the war, more than 60,000 men served in the Corps in the Union army; 1,700 soldiers during the service in the Federal Veteran Reserve Corps, of whom 24 died in action. ==See also==