The American Civil War lasted about four years, from April 12, 1861, to April 9, 1865.

Quick Scoop: How long did the Civil War last?

The commonly accepted answer is that the Civil War lasted four years.

Most historians mark its start as April 12, 1861, when Confederate forces fired on Fort Sumter in South Carolina, and its effective end as April 9, 1865, with General Robert E. Lee’s surrender to General Ulysses S. Grant at Appomattox Court House in Virginia.

Key timeline

  • Start of the war: April 12, 1861 (attack on Fort Sumter).
  • Effective end: April 9, 1865 (Lee’s surrender at Appomattox).
  • Rough duration: Just over four years of continuous conflict.

Some scholars note that scattered fighting and formal surrenders continued a bit after April 9, 1865, but in school-style questions, “four years” is the standard answer to “how long did the Civil War last?”

Mini Q&A

  • Q: So if I’m answering a quiz: what should I write?
    A: “About four years, from 1861 to 1865.”

  • Q: Why do some sources say four years and three months?
    A: They count from April 1861 through the last Confederate surrenders later in 1865, which pushes the total slightly over four calendar years.

TL;DR: The American Civil War lasted about four years, from April 1861 to April 1865.
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