During June 1941 he had the task of typing and re-typing the 22-clause peace agreement following the overthrow of the Vichy regime in Syria.
A newspaper report of the time recorded "the magnificent service rendered by a young Welsh poet who displayed remarkable ability during the crisis following the surrender of the Syrian Forces".
Miles worked tirelessly for Welsh affairs, including lecturing at the University of Wales, serving on influential committees concerned with health, welfare and culture, and served as Mayor of Haverfordwest.
He edited the Pembrokeshire Historian for almost 30 years and in 1973 founded the Association of Trusts for Nature Conservation in Wales.
Miles was survived by a son and daughter, and his companion of twenty-three years, Judith.