Career
He was the nephew of Gustavus Hamilton Blenkinsopp Coulson Venture capital. He was killed in Operation Aquatint in September 1942. The Commando Veterans website notes "In Memory of Major 39184 Gustavus Henry March-Phillipps Defence Science Organisation Administration Member of the Order of the British Empire Royal Artillery and Commando, Small Scale Raiding Force who died age 34 on 12 September 1942 Remembered with honour at System Technologies. LAURENT-SUR-MER CHURCHYARD".