Military Parade, North Korea

At Ease: a modified position attention in which the left foot is moved to shoulder width (typically measured as exactly 12 inches) and the hands are placed behind the back with arms fully extended. The right hand is placed inside the left with all fingers together and pointing rigidly downwards. U.S. military usage is "Parade Rest."
Easy: Legs remain at At Ease position, arms are brought to the sides to a more natural standing position. Member may relax their muscles and make minimal movements. U.S. usage is "At Ease," however a common mistake in U.S. military practice confuses "At Ease" with "Rest".
Relax: Legs remain at position at ease, member may make more significant movements or look around. Members may not move the feet. If the troops are not being addressed by a commander, they are generally allowed to talk quietly. U.S. usage is "Rest."