Civil War Army Organization and Order of Rank

Here is an explanation of the basic way both the Union and Confederate armies were organized. The units are listed from the largest to the smallest. The descriptions below can be considered the ideal or desired make up of the units. As the Civil War progressed, the size of the various units would change due to loss of men by disease, death, or injury. The force of men an army could bring would be added to, and subtracted from, with the ebb and flow of war.

Army – An army is the largest field force unit of military organization. The Union armies were commanded by a major general and were usually named after rivers (for example, the Army of the Potomac). The Confederate armies were commanded by a general and were usually named after the area from which they were based (for example, the Army of Northern Virginia). The way of naming the armies was not always followed by either the North or the South and exceptions can be found, sometimes or often leading to confusion.

A confusing example of the way armies were named is this example: the Union had the Army of the Tennessee, while the Confederates had the Army of Tennessee. An army was further divided into Corps.

Corps – A corps was commanded by a brigadier general or a major general for the Union, and with the Confederate States of America a corps was commanded by a lieutenant general. Major General George B. McClellan and President Abraham Lincoln organized the first corps in the Union Army in March, 1862. In 1862, the Confederates began organizing their armies using corps in September in the east, and in November in the west.

Prior to arranging corps, the Confederates had sometimes (and informally) used what were called “wings” or “grand divisions” to further group their armies. A corps would be made up of two or more divisions and each corps used a Roman numeral for its designation. The corps were also often referred to using their commander’s name.

Division – A division was the second largest unit making up an army. For the Union, a division was commanded by a brigadier general or a major general. For the Confederacy, a division was commanded by a brigadier general, and sometimes, but it was rare, by a major general. A division would be divided into usually 2 to 6 brigades. The Confederate divisions tended to be larger in manpower than the Union divisions and would be made up of more brigades. Some divisions in Confederate armies were of equal size to one corps from a Union army.

Brigade – A brigade was commanded by a brigadier general or maybe a senior colonel. A brigade was divided into regiments, usually two to six regiments to a brigade. The Confederate brigades were more apt to be made up regiments from the same state, than brigades in the Union armies.

Regiment – A regiment was commanded by a colonel. The regiment was probably the army organization unit that a soldier felt like he most belonged to. A regiment was made up of men from the same area of a state, mainly because they were raised by the various state governments. At least during the early part of the Civil War, a regiment would have men who were friends or neighbors back home, or were relatives. These regiments chose their own officers by electing them. Typically, a regiment was made up of 10 companies, with each company having 100 men. So, if mustering men for service went well, there were 1000 men in each regiment. A battalion was the name used for a regiment that had not mustered a full 10 companies with 100 men in each company.

Company – A company was commanded by a captain. With perfect army organization and strength, a company had 100 men. But because of disease and other causes (such as soldiers being killed in battle!), by 1862 a company might only have 30 to 50 soldiers. Companies were officially designated by letters or numbers, but often a company had an unofficial designation, often a nickname.

Does reading about Civil War history from long and dry academic-like books bog you down and cause you to lose interest? Would you like to read interesting stories based on facts of the Civil War, stories that inform you and move along with the war’s history? Does having to read from cover to cover tire you and cause you to drag through a history book? Would you prefer the freedom to skip around in a book and learn story-by-story about the Civil War? If you answered “yes” to any of these questions, then the factual stories in 125 Civil War Stories and Facts will help you learn Civil War history. The stories are informative and entertaining and it’s a fun way to learn about the Civil War. Do books like Civil War Trivia and Fact Book by Webb Garrison or The Civil War: Strange & Fascinating Facts by Burke Davis interest you? Then you will find 125 Civil War Stories and Facts follows in their tradition of providing the reader with rich and interesting information about the Civil War. Available as a Kindle device e-book or as a paperback. Get 125 Civil War Stories and Facts now!

 

Civil War Army Organization

Shown below is a chart to help clarify Civil War army organization somewhat. The soldiers shown in the background are members of the Petersburg, Virginia Detachment of the 3d Indiana Cavalry.

Civil War Army Organization

Order of Rank

Listed from top to bottom are the highest ranks of officers and gentlemen, all the way down to the lowly, but backbone of the army, private.

  • General
  • Lieutenant General
  • Major General
  • Brigadier General
  • Colonel
  • Lieutenant Colonel
  • Major
  • Captain
  • First Lieutenant
  • Second Lieutenant
  • Sergeant
  • Corporal
  • Private

Civil War Army Organization

By Civil War Trust Historian Garry Adelman


My book 501 Civil War Quotes and Notes features quotes made before, during, and after the Civil War. Each quote has an informative note to explain the circumstances and background of the quote. Learn Civil War history from the spoken words and writings of the military commanders, political leaders, the Billy Yanks and Johnny Rebs who fought in the battles, the abolitionists who strove for the freedom of the slaves, the descriptions of battles, and the citizens who suffered at home. Their voices tell us the who, what, where, when, and why of the Civil War. Available as a Kindle device e-book or as a paperback. Get 501 Civil War Quotes and Notes now!

Slavery

The “Peculiar Institution”

Slavery was a fact in the United States until the cleansing of the Civil War. The bloodshed of the Civil War brought an end to slavery and kept this nation as an undivided union of states. Slavery was the foundation cause of the Civil War. The evil, cruel, brutal, and abhorrent institution of slavery in the United States came to an end through the Civil War.

Am I Not A Man And A Brother?It is important to note that slavery was not unique to the United States. Many European countries had slavery before it came to the New World colonies and grew. Countries like Spain and Portugal had significant counts of slaves before 1492. But, this is no defense of the institution of slavery. The world was guilty of slavery.

In 1619 a Dutch ship arrived at the Virginia colony and sold “20 and odd negroes” to colonists. Some of these blacks became indentured servants (people who worked for a period of years to pay for their passage to the New World, then became free) but others were slaves. Most blacks in the Virginia colony were either free or indentured servants in 1640. Slavery grew and flourished in the colonies, especially in the Southern ones. By 1700 in the Virginia colony, most blacks were in the bondage of that “Peculiar Institution.”

Slavery was a disease of humanity that spread to the colonies of the New World. It should be known that although the United States was guilty of slavery, it fought a war against itself to end this “Peculiar Institution” within its borders. As a result of the Civil War, in which brother literally fought against brother and hundreds of thousands died, slavery ended in the United States.

King Cotton

The South depended on slavery for its agricultural and economic success. Cotton was King in the South and the institution of slavery made it very profitable. Indeed, the South’s economy was based on slavery and cotton. One of the main contributing factors to the Civil War was that the South was willing to go to war with its own fellow countrymen in order to preserve the enslavement of other human beings.

  

Uncle Tom’s Cabin

Harriet Beecher Stowe

Harriet Beecher Stowe

In 1808, the importation of slaves was made illegal in the United States of America. Harriet Beecher Stowe wrote Uncle Tom’s Cabin in 1852, as an outcry against slavery after the passage of the Fugitive Slave Act of 1850.

In Uncle Tom’s Cabin, slaves were described as victims of the Southern system. Harriet Beecher Stowe’s book was a powerful factor in bringing about anti-slavery sentiment in the North, Uncle Tom’s Cabin was very popular book among abolitionists. The expansion of the country westward, with new territories and states coming into being, only fueled debate and conflict over the spread and continuation of slavery. When Abraham Lincoln was elected president in 1860, the South believed he intended to end slavery. Secession, and the Civil War followed. Uncle Tom’s Cabin sold more copies than any book other than the Bible and caused Abraham Lincoln to exclaim upon meeting Harriet Beecher Stowe during the Civil War: “So you’re the little woman who wrote the book that started this great war!”

 

In 1860, approximately 4,500,000 white people were living in the states that had slavery. Of these 4,500,000 approximately 46,000 of them owned more than 20 slaves. Approximately 4,000,000 slaves lived in America at the start of the Civil War. On January 1, 1863 President Lincoln issued his Emancipation Proclamation that declared free the slaves in the parts of the country which were in rebellion. Only Northern victory and preservation of the Union ensured the end of slavery in the United States.

Distribution Of Slaves In The Southern States

The shown map is: Distribution of Slaves in the Southern States from the book History of the United States by Charles A. Beard and Mary R. Beard.

  • White areas depict less than 25% slave distribution
  • Light gray areas depict 25 – 50%
  • Dark gray areas depict 50% and greater
Distribution of Slaves in the Southern States

Distribution of Slaves in the Southern States

Quotes By Abraham Lincoln Regarding Slavery

“In giving freedom to the slave we assure freedom to the free,–honorable alike in what we give and what we preserve.”

— Abraham Lincoln, from his Second Annual Message to Congress, December 1, 1862.

“My paramount object in this struggle is to save the Union, and is not either to save or destroy slavery. If I could save the Union without freeing any slave, I would do it; and if could save it by freeing all the slaves, I would do it; and if I could save it by freeing some and leaving the others alone, I would also do that.”

— Abraham Lincoln, from a letter to Horace Greeley of August 22, 1862. (The Emancipation Proclamation had been written but not yet released).

“I intend no modification of my oft-expressed personal wish that all men everywhere could be free.”

— Abraham Lincoln, from a letter to Horace Greeley, August 22, 1862.

Slavery Was Cruel

Scars of a whipped Mississippi slave.

Scars of a whipped Mississippi slave.

The ugly fact is that slaves were treated as property. Slavery was a brutal, cruel, unfair, and evil thing. Slaves did not have the right to vote. Slaves could not own land. Slaves could not travel. Slave marriages were not recognized by law. Slaves were allowed to work, and work hard from the early morning light until darkness… or longer if the moonlight was bright.

Slave families could be split up by the whims and desires of their owners. Slaves could be beaten and whipped to make them obey. Some slaves were killed either by their owners or by hard work. Disease killed slaves. Slaves worked on plantations and farms, in homes, on docks, in businesses, and anywhere labor was needed.

The history of slavery still haunts the United States to this day. Perhaps only with the coming of each new generation, with its hopefully new and unprejudiced rational understanding, will the scar of slavery completely fade away. That will be a glorious time.

Learn Civil War History Podcast Episode Seven: Freedman Jourdon Anderson Writes A Letter To His Old Master

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