S-2: The primary staff intelligence officer at the battalion, regimental, or brigade level.
S-3: The primary staff operations officer at the battalion, regimental, or brigade level.
S-4: The primary staff logistics officer at the battalion, regimental, or brigade level.
SAMS: School of Advanced Military Studies; a one-year “postgraduate” course for select Army officers following their completion of Command and Staff College at Ft. Leavenworth.
SCHWERPUNKT: The main effort in an attack.
SEABEES: Navy construction engineers who deploy on land. Lineage dates to WWII.
SF: U.S. Army Special Forces, known to the public as “Green Berets.” Operating in small groups, they accomplish large missions.
SIGNAL LEECHES: Revolutionary technology that allows broadcast signals to intercept and “ride” other signals to nearby destinations to attack, penetrate, or degrade a communications and control system.
STRIKEWARN: A brief, rigidly formatted message to alert military units to an impending nuclear attack.
TC: Tank Commander. Now used for the on-board commander of any combat vehicle.
UAV: Unmanned aerial vehicle, a pilotless aircraft that, in different configurations, can perform any air mission. Known colloquially, though inaccurately, as a “drone.”
USG: United States Government.
VAMPIRE ATGM: Generic term for an antitank guided missile that, once launched, can identify and strike its own targets. An evolution of older, primitive fire-and-forget systems.
WSO: Weapons systems officer. The “back-seater” in a fighter aircraft with a two-man crew.
XO: 1.) The executive officer, usually of a battalion; 2.) pretty good cognac.
Z DIAGRAM: An old-fashioned, formal calculation for a bombing run, projecting the most advantageous altitudes for the attack profile, point of release for bombs, and the post-detonation fragmentation pattern (which the pilot needs to avoid).
155: 155mm artillery piece, self-propelled or towed. The backbone of the Field Artillery.