Colonisation of Australia By cheyenne7!!!! Jun 14, 1825 • Van Diemens Land became a separate colony • Van Diemens Land became a separate colony Jun 18, 1829 • Western Australia proclaimed a colony Dec 28, 1836 • South Australia became a colony Jul 1, 1851 • Victoria separates from New South Whales Jun 6, 1859 • Queensland separates from New South Whales Jan 1, 1901 • Federation of the colonies into the countries