Order (award) levels or medals? Such a question does not stand before the American military, including the military "parade" military units. But only in one case: full dress.
Representatives of the Washington 8 Marine Corps unit (often called the Washington Marine Corps Barracks) use both of these options in training uniforms, ceremonies, and the changing ceremony. So, on the left side of the chest a set of medals is formed, and on the right - award (order) straps ("pads").
This version of wearing a military uniform is characteristic of both generals and representatives of the rank and file (sergeant).
In the photo - General David Berger.
The other day, General Berger replaced General Neller as commander of the US Marine Corps.
At the same time, the daily uniform of US military personnel under the statutory rules does not imply the wearing of medals. On the left side of the chest there are award trims, the right side is “empty”.
The field uniform of the American soldier wearing awards, including during the participation of a soldier in official ceremonies, does not imply.