He was the son of James A Fulton and Bella (Elizabeth) Fulton. In 1901 the family were living in house 2, Gortycavan, Articulate, Co. Londonderry.
Fulton would have joined the Belfast Banking Company around 1911.
By 1911 they had moved to house 28, Mount Street, Coleraine, Co. Londonderry. John Alexander Fulton is described as a Bank Clerk.
On 28th September 1912, Fulton's father, signed the Ulster Covenant at the Town Hall, Coleraine.
Fulton served with the 12th Bn. Royal Irish Rifles and attained the rank of Lieutenant. He is also recorded as serving with the 3rd Bn. Royal Irish Regiment.
The Belfast Banking Company 'Roll of Honour' booklet records Fulton as being 'previously wounded' with his last known address as Kilkenny. It also states that he had been 'twice wounded in action'.
The National Archives records a Medal Index Card as follows:
Royal Irish Regiment, 2nd Lieutenant
He served in Kingstown and Strabane.