Friendly fire is an attack by a military force on non-enemy, own, allied or neutral, forces while attempting to attack the enemy, either by misidentifying the target as hostile, or due to errors or inaccuracy. Fire not intended to attack the enemy, such as negligent discharge and deliberate firing on one's own troops for disciplinary reasons, is not called friendly fire. Nor is unintentional harm to non-combatants or structures, 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.