He fights." Among memorable field leaders of the army were Nathaniel Lyon (first Union general to be killed in battle during the war), William Rosecrans, George Henry Thomas and William Tecumseh Sherman. The first and most significant was on April 9, 1865, when Robert E.
Typically, the Department or District commander also had field command of the army of the same name, but some conflicts within the ranks occurred when this was not true, particularly when an army crossed a geographic boundary.
The regular army, the permanent United States Army, was intermixed into various formations of the Union Army, forming a cadre of experienced and skilled troops.
About 360,000 Union soldiers died from all causes; 280,000 were wounded and 200,000 deserted. Approximately 20% of these officers, mostly Southerners, resigned and joined the Confederate army.
Since the first call-up was for just three months and many men then reenlisted for three years, it is not known how many men actually served.
An organization that covered a defined region, including responsibilities for the Federal installations therein and for the field armies within their borders.
Those named for states usually referred to Southern states that had been occupied.
The Signal Corps was created and deployed for the first time, through the leadership of Albert J. Below major units like armies, soldiers were organized mainly into regiments, the main fighting unit with which a soldier would march and be deployed with, commanded by a colonel, lieutenant colonel, or possibly a major. Some units only possessed between four and eight companies and were generally known as battalions.
Regiments were almost always raised within a single state, and were generally referred by number and state, e.g. Regiments were usually grouped into brigades under the command of a brigadier general. Mc Clellan, built and trained the massive Union Army of the Potomac, the primary fighting force in the Eastern Theater.
Lee disapproved of secession, but refused to bear arms against his native state, Virginia, and resigned to accept the position as commander of Virginian C. Though officers were able to resign, enlisted soldiers didn´t have this right; which meant that they usually had either to desert or to wait until their enlistment term was over in order to join the Confederate States Army.
While the total number of those is unknown, only 26 enlisted men and non-commissioned officers of the regular army are known to have legally left the army to join the Confederate army when the war began.
A collection of Departments reporting to one commander (e.g., Military Division of the Mississippi, Middle Military Division, Military Division of the James).