Born at Clonmel in County Tipperary, the third son of Sir Francis John Milman, 4th Baronet and his wife Katherine Grace Moore.
[1] After graduating in 1899, Milman followed his fathers footsteps and enlisted in the Royal Artillery with the rank of second lieutenant in September 1900.
[3] While serving in British India, Milman made two appearances in first-class cricket for the Europeans against the Parsees in the 1901–02 Bombay Presidency Matches,[4] taking four wickets.
[7] By 1910 Milman was an officer in charge of cadets at the Royal Military Academy, Woolwich,[8] with his tenure in that role ending in January 1912.
[16] Shortly after the end of the war, Milman was made a brevet lieutenant colonel in December 1918,[17] and he was placed on the reserve list in March 1922.