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Wiktionary
g-2

abbr. (context military slang English) gear-to, gear up; to gear up and get ready for battle, movement, or any type of action. init. (context military intelligence US English) army military intelligence officer position at the division level and higher

Wikipedia
G-2 (intelligence)

G-2 refers to the military intelligence staff of a unit in the United States Army. It is contrasted with G–1 (personnel), G–3 (operations), and G–4 (supply). These "G" sections have counterparts in other branches of the service, the U.S. Navy using an N– designation and the Joint Staff the prefix J.

G-2 intelligence played an important role during World War II, both aiding fighting forces and in special missions such as those of T-Force and Operation Alsos.

Usage examples of "g-2".

It would be awkward if I thought my G-2, an officer I personally promoted to captain, was mocking me.

By that time, Pickering had so impressed Vandegrift with his intelligence and competence that Vandegrift, short of senior officers, appointed him Acting G-2, until a trained replacement could be sent to the island.

Lieutenant Hart correctly suspected, was Brigadier General Charles Willoughby, USA, MacArthur's G-2 (General Staff Officer, Intelligence).

Forrest, Assistant Chief of Staff, G-2, Colonel Wilson and Gunner Hardee had correctly surmised that the Office of Management Analysis probably had more to do with intelligence than either management or analysis.

May I present Captain James Weston, USMC, late G-2 of United States Forces in the Philip-pines?

HE IS A VERY UNUSUAL YOUNG OFFICER WHO JUST CAME OUT OF THE PHILIPPINES WHERE HE WAS G-2 FOR GENERAL FERTIG'S GUERRILLA OPERATION.

Willoughby, MacArthur's G-2, shortly after his arrival in Brisbane seven weeks before, Waterson had been waiting in vain for the meeting with MacArthur Willoughby had promised to arrange "just as soon as the Supreme Commander can find time in his schedule.

Until a replacement could be sent in to replace the G-2 who was killed in action.

For that matter, Humphrey had wondered idly more than once what the Parris Island G-2 did at all.

The function of a G-2 in the Marines was to provide the Corps with whatever information he could lay his hands on about the enemy.

There are four people in this headquarters with access to TOP SECRET-MAGIC material: General MacArthur, his G-2, Colonel Charles A.

Goettge, the G-2, was standing before a large, celluloid covered map mounted on a sheet of plywood.

The G-2 building was another eight-man squad tent, around which had been built a wall of sandbags.

The Map Room of the G-2 Section was like a steam bath, and Captain Pickering had elected to work in his undershirt.

I am no more qualified to be the Division G-2 than I am to flap my wings and fly.