uh...General Grade 4 maybe?
Brigadier General
x credits
General grade four
the highest rank is general grade 4 witch is achieved at 50 high skill or 5000xp.
Warrant Officer Grade 3
Lieutenant Colonel grade 1
Ranks: Recruit Grade 1 Apprentice Grade 1 Apprentice Grade 2 Private Grade 1 Private Grade 2 Corporal Grade 1 Corporal Grade 2 Sergeant Grade 1 Sergeant Grade 2 Sergeant Grade 3 Gunnery Sergeant Grade 1 Gunnery Sergeant Grade 2 Gunnery Sergeant Grade 3 Gunnery Sergeant Grade 4 Lieutenant Grade 1 Lieutenant Grade 2 Lieutenant Grade 3 Lieutenant Grade 4 Captain Grade 1 Captain Grade 2 Captain Grade 3 Captain Grade 4 (staff) Major Grade 1 Major Grade 2 Major Grade 3 Major Grade 4 Commander Grade 1 Commander Grade 2 Commander Grade 3 Commander Grade 4 Colonel Grade 1 Colonel Grade 2 Colonel Grade 3 Colonel Grade 4 Brigadier Grade 1 Brigadier Grade 2 Brigadier Grade 3 Brigadier Grade 4 General Grade 1 General Grade 2 General Grade 3 General Grade 4 (5 Star General)
luitenent i think
It depends on how much you play it.
5 star general
Halo 3 recon was never officially released it is thought though that it was the original name for Halo 3 ODST