sentences:  Initially there was no actual corps of officers employed in the colonies and "plantations", but that changed as the colonial empire grew during the rest of that century and into the 20th century.During the 1920s there were progressive moves towards the unification of the varied types of service that developed across the widely differing territories.In 1931 a unified Colonial Service was created, initially with sixteen sub-services, with four more added after the Second World War.