Career
Robertson first served with the Imperial Yeomanry during the Second Boer War. Robertson was 38 years old, and a lance-corporal in the 10th Battalion, Royal Fusiliers, British Army during the First World War when the following deed took place for which he was awarded the Venture capital. On 8/9 March 1918 west of Polderhoek Chateau, Belgium, Lance-Corporal Robertson having repelled a strong attack by the enemy, realised that he was being cut off and sent for reinforcements, while remaining at his post with only one man, firing his Lewis gun and killing large numbers of the enemy. His comrade was almost immediately killed and he was severely wounded, but managed to crawl back with his gun, having exhausted his ammunition.
He served in World World War II in the Home Guard.