The court-martial of Fitz John Porter (November 25, 1862January 22, 1863) was a major event of the American Civil War. Major General Fitz John Porter was found guilty of disobeying a lawful order, and misconduct in front of the enemy and removed from command based on internal political machinations of the Union. The court-martial was later found to be unjust and overturned, and Porter was reinstated in the United States Army.