radio duty
People who get in trouble get reassigned to headquarters and have to monitor the radio. I spent a few late nights sitting here.

combat xmas tree
A combat Christmas tree– complete with an AT4, belts of 7.62mm and .50-cal, smoke grenades, and high explosive 40mm grenades.

duty first
The bunker we stayed in just before leaving Iraq. The First Infantry division’s motto is “Duty First”.