Thomas Jonathan "Stonewall" Jackson was a general officer in the Confederate States Army during the American Civil War. He played a prominent role in nearly all military engagements in the Eastern theater of the war until his death. Military historians regard him as one of the most gifted tactical commanders in U.S. history.

In military terminology, friendly fire or fratricide is an attack by belligerent or neutral forces on friendly troops while attempting to attack enemy/hostile targets. Examples include misidentifying the target as hostile, cross-fire while engaging an enemy, long range ranging errors or inaccuracy. Accidental fire not intended to attack enemy/hostile targets, and deliberate firing on one's own troops for disciplinary reasons, is not called friendly fire, and neither is unintentional harm to civilian or neutral targets, which is sometimes referred to as collateral damage. Training accidents and bloodless incidents also do not qualify as friendly fire in terms of casualty reporting.