Final answer:
In the Parade Rest position, heels are traditionally 12 inches apart, reflecting discipline and uniformity in military formations.
Step-by-step explanation:
In a Parade Rest position, the heels are typically supposed to be 12 inches apart, measured from heel to heel. The Parade Rest is a position of respect and attentiveness in various military organizations. The precise measurements can sometimes vary depending on the specific branch's drill manual or regulations, but the common standard is 12 inches to ensure uniformity during formations. It is important for service members to maintain this precise distance as a display of discipline and order.