Life of Benjamin O. Davis Sr. By zac and shane Jul 1, 1877 Benjamin O. Davis Sr. was born. Was born in Washington DC Period: Jul 1, 1877 to Nov 26, 1970 Life of Benjamin O. Davis Sr. Jul 13, 1898 Benjamin O Davis Sr entered the military. May 26, 1901 Benjamin recieved his commision. Mar 30, 1905 Benjamin was permoted to first lieutenant Dec 18, 1912 Benamin has his first son. Dec 24, 1915 Benjamin was permoted to captain. Aug 5, 1917 Benjamin was permoted to major. Oct 14, 1919 Benjamin reverted to his permanent ramk of captain. Feb 26, 1940 Benjamin became a brigadier general. Sep 20, 1948 Benjamin left the military. Nov 26, 1970 When Benjamin O Davis Sr died