Civil War 1861-1865 North vs. South. U. S. went to war with itself during the Civil War. It was a war between the Northern and the Southern States. Americans.
Think about it. WarDeathsYears Afghanistan2,31614 Iraq4,2625 American Revolution25,0008 Vietnam War58,22011 World War I116,7081.5 World War II416,800 4.
The First Two Years of the Civil War Chapter 18 section 2.