how many years as a colonel before brigadier general
COL Rank Description: The Colonel usually commands a brigade (consisting of 3,000 to 5,000 soldiers) and is assisted by a Command Sergeant Major. Alternatively, can serve as a chief of divisional level staff agencies. Promotion Requirements: Must have 3 years TIG as a Lieutenant Colonel. TIS is typically 22 years but based on needs of the Army can fluctuate +/- 1 year. Getting promoted to Colonel becomes more competitive as only 50 percent of those qualified based on TIS/TIG will be selected for promotion. Paygrade O-7 Brigadier General (BG) BG Rank Description: The Brigadier General serves as the deputy commander for the commanding general of an Army division. Assists with the staff's coordination and planning of a mission. Promotion Requirements: The rank of Brigadier General is limited to a total of 150 for the entire Army. More on General Officer promotions. Paygrade O-8 Major General (MG) MG Rank Description: The Major General commands a division (consisting of 10,000 to 15,000 soldiers).