Marshall Watterson was the son of William John and Sarah Watterson. He was born on 29th July 1893 in Aughrim, Ballyronan, Magherafelt. The large family lived in Aughrim. His father was a farm labourer. Marshall, like his younger brother George, was employed as a cloth starcher. In September 1914, one month after war broke out, he enlisted in Glasgow in the Highland Light Infantry, the same regiment that his younger brother George had joined a few months earlier. Private Marshall Watterson was serving with the 12th Battalion of the Highland Light Infantry when he was reported as missing in action at Loos on Saturday 25th September 1915. He is recorded as being killed in action on that day.