U.S. Army Officer Rank Structure

Second Lieutenant / 2LT / O1
First Lieutenant / 1LT / O2
Captain / CPT / O3
Major / MAJ / O4
Lieutenant Colonel / LTC / O5
Colonel / COL / O6
Brigadier General / BG / O7
Major General / MG / O8
Lieutenant General / LTG / O9
General / GEN / O10
General of the Army / GOA