Like many of her siblings, Feilding felt the need to do her part when war broke out. Three of her sisters, Lady Clare, Lady Elizabeth, and Lady Victoria would serve, as well as three brothers: Major Rudolph, Viscount Feilding, Coldstream Guards, who survived the war; Lieutenant-Commander the Hon. Hugh Feilding, Royal Navy, killed in action on 31 May 1916 at the Battle of Jutland; and Captain the Hon. Henry Feilding, also Coldstream Guards, who would die on 9 October 1917 from wounds received in action in Flanders just three months after his sister had left. In September 1914, after a short training course at Rugby Hospital, Feilding travelled to the Western Front in Belgium where she began driving ambulances for the Munro Ambulance Corps, an all-volunteer unit which included May Sinclair, Elsie Knocker and Mairi Chisholm. This corps, comprising a convoy of motor ambulances donated by the British Red Cross, consisted of transporting wounded men from front line positions between Nieuport and Dixmude to the hospitals at Furnes. Though she was from a privileged upbringing Feilding had an easy demeanor that transcended social boundaries, one that endeared her to all that she came into contact with whether royalty or the ordinary fighting man. It was reported that her 'five o'clock teas' among the ruins of Furnes gained great fame among the Belgian officers and enlisted men stationed there. Her heroism was such that her ambulance work at Dixmude was recognised in a 'special order of the day' issued on 31 December 1914 by French Rear-AdmiralPierre Ronarc'h, commanding the Fusiliers Marins for which she subsequently received the French Croix de Guerre. In 1916, Commander Henry Crosby Halahan, RN, Officer Commanding Royal Naval Siege Guns, wrote the following letter of recommendation to Prince Alexander of Teck, head of the British Military Mission in Belgium:
I venture to submit that Lady Dorothie Feilding should in like manner be rewarded. The circumstances are peculiar in that, this being an isolated Unit, no Medical organization existed for clearing casualties other than this voluntary one and owing to indifferent means of communication etc, it was necessary for the Ambulance to be in close touch with the guns when in action. was thus frequently exposed to risks which probably no other woman has undergone. She has always displayed a devotion to duty and contempt of danger which has been a source of admiration to all. I speak only of her work with the Naval Siege Guns, but your Serene Highness is also aware of her devoted services to the Belgian Army and to the French – notably to the Brigade des Marins.
This citation ultimately resulted in Feilding becoming the first woman awarded the Military Medal for bravery on 1 September 1916 as notified in the London Gazette. Five days later she was decorated with the medal by King George V himself at Windsor Castle. She was also decorated by King Albert I of Belgium with the Order of Leopold II, Knights Cross for service to his country's wounded. In her letters, which she wrote home to Newnham Paddox almost daily, Feilding would reflect on the tragedy and horror of war and also the problems of being a woman at the front contending with gossip, shells, funding, lice, vehicle maintenance and inconvenient marriage proposals. After two years at the front she began to look pale and tired. She served with the corps in Flanders until June 1917 when she returned home to get married. On 5 July 1917, Feilding wed Captain Charles Joseph Henry O'Hara Moore, MC, of Mooresfort, Tipperary. She moved to Warley, Middlesex where her husband was stationed in the 2nd battalion, Irish Guards. After a brief honeymoon period, Feilding was back behind the wheel of an ambulance, ferrying the wounded around London.
Post-War years
After the war, the couple lived most of the year at his ancestral home, Mooresfort House in South Tipperary. They had four daughters and one son. Feilding became an active member of the British Legion as well as being President of the Tipperary Jubilee Nursing Association and the local Agricultural show Society. She had always been a keen huntswoman and this continued in Ireland where she was a regular feature at hunt meets, especially the Scarteen Hunt. In 1935, the Irish Times stated she had been "prominently associated with the Scarteen Hunt to the success of which her great organizing powers in no small degree contributed." In no small measure, these powers had been honed during her time with the Munro Corps. Her husband had a stud at Mooresfort and the couple regularly attended race meetings in Ireland and England.
Death
Feilding died of heart failure in Tipperary on 24 October 1935 at the age of 46. She was brought back home to Warwickshire and buried on 27 October in the family plot at the Monks Kirby Roman Catholic cemetery.
