Archibald Robert Hadden was born on the 22^nd October 1889. He was the elder son of Reverend Robert Henry Hadden, who was the Vicar of St. Mark, North Audley Street, London, and Eva Prudence, second daughter of John Carbery Evans, of Hatley Park, Cambridgeshire. His father served as Chaplain in Ordinary to Queen Victoria and as Honorary Chaplain to Edward VII.

Archibald joined Ashburnham in September 1902, and was joined by his younger brother Eustace Walter Russell Hadden in 1903.

At school, he took part in the Cadet Corps, and was promoted to the rank of Corporal in 1906. He was also a singer. In June 1907, The Elizabethan records:

Many Ashburnhamites sang in the very successful School Concert last month: D. J. Jardine, J. C. M. Davidson, D. M. Low, C. C. Treatt, and A. R. Hadden were prominent basses, while D. S. Scott and R. W. Dodds shone as alto and soprano respectively.

He left the school in July 1907, and matriculated into Christ Church, Oxford later that year. In 1909, the year his father died, Archibald joined the army as a 2^nd Lieutenant in the 9^th Battalion London Regiment (Queen Victoria’s Rifles). By March 1911, he had risen to Lieutenant, and in September 1914, he was promoted again to Captain.

On the 6^th of May 1915, Archibald married Evelyn Forster, the only daughter of Edwin Thomas Morse Tunnicliffe, MRCS, of North Finchley. Between August 1914 and January 1917, he served on the staff of the 3^rd London Infantry Brigade under General Monck.

During this time, his brother Eustace died of appendicitis while serving in France on the 11^th June 1916. Archibald and Evelyn’s son, Alan Edwin Robert Haddon (GG 1929-1933), was born on 29^th August 1916. Archibald went out to the western front, in January 1917, where he joined his regiment. But on the on the 25^th April 1918, he was killed in action at Hangard Wood.