The Battle of Vicksburg. This Confederate city was the last impediment to the Union's control of the Mississippi River, and it was under siege for nine months before falling to the Union Army and Navy.
The three days battle
The Civil War lasted from 1861 to 1865
There was no such thing as the ANZAC war. The ANZACs were involved in an entire campaign consisting of numerous battles, and the campaign lasted for eight months, from April until December.
The final battle of the Civil War was fought at Five Forks, VA on April 6-7, 1865. This battle almost completely destroyed the Confederate army. A.P Hill was killed in this battle.
The El Salvador Civil War Lasted May 9, 1979 - January 16, 1992 (12 years, 8 months and 1 week)
The siege of Petersburg lasted nine months.
The three days battle
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the battle of Bull Run
The Battle of Atlanta from the Civil War lasted six weeks.
Sharpsburg.
The Battle of Atlanta fought during the American Civil War lasted Six weeks.
The battle that occurred in 1916 and lasted for 6 months was The Battle of Verdun. This battle took place between France and Germany in Verdun, France.
The civil war in Africa lasted 2 years, 6 months, and 3 days.
The Battle of Shiloh.
Possibly the Battle of Centralia, MO which lasted only three minutes
During the civil war, it lasted for a couple of hours. It occurred on August 10, 1861.