Oscar Mike to the glossary. Copy that.
The direction and distance from one point to another, expressed in compass degrees and distance, which is how soldiers navigate without GPS. A compass direction measured in degrees for navigation purposes.
An underground or heavily fortified defensive structure where soldiers hide while terrible things happen above them. A reinforced underground shelter designed for protection from artillery and airstrikes.
Surrounding someone and refusing to let supplies in, which is either clever strategy or a slow punishment depending on your perspective. Military sealing off of an area to prevent supplies or people from entering or leaving.
An identifying armband or badge worn on the upper arm to display affiliation, rank, or purpose—think ARP wardens in WWII or modern security personnel badges.