Le dicton est né des pilotes de chasse de la Première Guerre mondiale faisant référence à la position à six heures voulant qu’un pilote assure les arrières à son camarade.

I’ve got your six originated from World War I, where fighter pilots would refer to the rear of the airplane as the six o’clock position. If a pilot would say, I’ve got your six to a fellow fighter pilot, it meant they had them covered.