 Complete the following phrase:  The design consisted of grouping trees around a central Royal Oak, symbolizing the King. An inner ring of oak trees, known as the Empire Circle, represents the United Kingdom, Canada, Australia, New Zealand, India, South Africa and the Crown Colonies. To the north, the Imperial Service triangle of trees represented the Royal Navy, Air Force and Army. On either side of the ring are separate groves of maple trees representing the 1st, 2nd, 3rd and 4th Canadian divisions, Siberian troops, and Corp Troops to the east and west. The Corps Troops trees included trees commemorating Canadian nursing sisters and veterans of the Second Boer War, the 