Arthur Percy Sullivan VC was an Australian recipient of the Victoria Cross (VC), the highest award for gallantry in the face of the enemy that can be awarded to a member of the British Armed Forces. Born in South Australia, Sullivan worked for the National Bank of Australasia prior to enlisting in the Australian Imperial Force (AIF) in April 1918 for service in World War I. He had arrived in the United Kingdom, but had not completed training when the Armistice came into effect on 11 November. Sullivan was promoted to corporal in March 1919, but wanting to see active service he sought and received his discharge from the AIF on 28 May. On the same day, he enlisted in the British Army for service with the North Russia Relief Force, part of the Allied intervention in the Russian Civil War.

Crystal Brook is a town in the Mid North of South Australia, 197 kilometres north of the capital, Adelaide. According to the 2021 Census, the population of the town was 1,322. Crystal Brook is in a very picturesque location, being at the start of the Flinders Ranges. The town has multiple viewing points and parks. It was named after the spring-fed creek next to which it was founded.