how long does it take to become an army colonel
ANY officers chances of making full bird Colonel are about 5%. The average Officer retires as LTCol/O-5. Very few make O-6 or higher. this is just one example, but my Dad who started in the Army out of ROTC in college and pretty much went straight to vietnam, became a full colonel when i was a sophomore in high school. roughly speaking, this comes out to about 20 years (just like other posts have said).