Billo_Really said:
Grunt = 0300 MOS (Military Occupation Specialty) field. After all Marines are trained on warfare and weapons they move on to their specialist schools to become Pilots, Communicators (0600), Engineers, Clerks, Supply (0400), Intel (0200), Operations, Motor T, etc. Marines that are going to be in the 0300 field move on to their specialist schools and become focused on Infantry solely or Grunts.
0300 Infantry Common Skills:
0311 Infantry Rifleman Course
0331 Infantry Machine gunner Course
0341 Infantry Mortarman Course
0351 Infantry Assaultman Course
0352 Infantry Anti-tank Guided Missileman Course
These are "Grunts." After graduation, they are stationed in their units in the Infantry where other specialist MOS's are also located. The Air Wing and the FSSG (Fleet Service Support Group) all need Communicators, Admin, Supply, Motor T, etc. So does the Infantry.
In the Infantry, Communicators are the specialists with the Comm gear, however, Grunts are trained to operate field radios, because we can not be everywhere. The Platoons will have a Grunt with a radio and the Company will have an actuall Communicator they talk to. Since Communicators frequently live and must perform as the "Grunts" do, they are called "Battery Operated Grunts." This is me, except now I am a planner and grown beyond the days of the little guy with the radio on his back.