Second Lieutenant
(2Lt) - O1

First Lieutenant
(1Lt) - O2

Captain
(Capt) - O3

Major
(Maj) - O4

Lieutenant Colonel
(LtCol) - O5

Colonel
(Col) - O6

Brigadier General
(BrigGen) - O7

Major General
(MajGen) - O8

Lieutenant General
(LtGen) - O9

General
(Gen) -O10