Ross originally served in the
Royal Flying Corps, having joined in August 1917. He was assigned to 29 Squadron RAF on 25 March 1918 as a
Royal Aircraft Factory SE.5a pilot. He began his victory roll on 26 May 1918; by 10 November, the day before the armistice, he had accounted for two observation balloons and sixteen enemy planes destroyed, and two planes driven down out of control. Although he shared some of his victories with others, such as
Francis James Davies,
Reginald H. Rusby,
Ernest Charles Hoy, and
Arthur Reed, Ross also singlehandedly destroyed eight enemy fighters. ==Post World War I==