1609 Captain William Keeling, merchant seaman and adventurer exploring the East for the East India Company, discovers the Cocos Atoll during one of his voyages from Java to England.
1805 British hydrographer James Horsburgh charts the islands and calls them the Cocos-Keeling Islands in his sailing directory. He names one of the islands after himself.
1825 Captain John Clunies-Ross, a Scottish trader, lands on the islands on his homeward voyage from the East Indies. His orders are to investigate Christmas Island for settlement. Bad weather prevents these plans but he surveys the Cocos-Keeling Islands, digs wells and plants fruit trees.
1826 Alexander Hare, British merchant known as the 'English White Rajah of Borneo', and a group of his slaves are brought to the islands by Robert Clunies-Ross (brother of John) on the Hippomeses. Hare sets up the first settlement on Home Island (then called Goose Island).
1827 John Clunies-Ross and party arrive and settle on Pulu Gangsa (now the cemetery) but later move to South Island due to tension with Hare.
1829 Hare exports the first coconut oil from Cocos Islands to England on the Borneo.
Alexander Hare occupies Goose (Home), Horsburgh, Direction and Prison Islands with a total of 98 persons, mainly of Malay decent but some from Dutch Islands as far East as Papua, and some of African and Chinese decent.
1831 Increasing disputes between Alexander Hare and John Clunies-Ross as well as Hare's mounting financial problems lead to Hare travelling back to Batavia. John Clunies-Ross assumes control of the islands.
1834 Hare dies in Java. John Clunies-Ross moves to Home Island and takes over Hare's operations.
1836 John Clunies-Ross travels to Mauritius to seek British annexation of the islands.
Charles Darwin visits the atoll on the Beagle, surveys the islands and forms his theory of atoll formation.
1854 John Clunies-Ross dies; John George Clunies-Ross takes over.
1857 Captain Fremantle arrives on HM Juno to annex the islands to Britain, but makes a mistake as he was supposed to annex the Cocos Islands in the Andaman Group. This means that John George Clunies Ross is designated as governor of Cocos.
1871 John George Clunies Ross dies, George Clunies Ross assumes control over the Cocos Settlement.
1886 Queen Victoria grants the islands to George Clunies-Ross and his descendants.
Building of Oceania House commences using tiles and bricks from Scotland (completed in 1893).
1901 Eastern Extension Telegraph Station establishes a relay cable station on Direction Island. Cables go to Rodrigues, Mauritius, which then links to Durban, South Africa, also to Batavia, Java, which then links to Singapore and also to Fremantle, Western Australia.
1910 A Wireless Station is established to communicate with passing ships.
George Clunies Ross returns to the UK and dies on the Isle of Wight (his body is later reburied on Home Island). His son John Sidney Clunies-Ross assumes control of Cocos Islands.
1914 Cocos Cable Station is attacked by the German raider SMS Emden. The Emden is defeated by the Australian light cruiser HMAS Sydney (1) and beached on the reef at North Keeling Island (Pulu Keeling National Park).
1941 Ceylon Garrison Artillery establishes 2 x 6-inch guns on Horsburgh Island.
1942 February: a naval bombardment from a Japanese submarine causes slight damage to the Cable Station.
March: A Japanese warship shells Direction Island; false wireless message send 'Direction Island knocked out', shell holes are painted on side of buildings and huge decoy fires convince Japanese that the relay station is destroyed. Station continues to operate in secret.
1943 Qantas begins a non-stop service across the Indian Ocean between Perth and Colombo via Cocos Islands; they flew 5700 kms and averaged 27-30 hours in the air. The service was terminated in 1946 after 824 crossings had been made.
A regular Japanese air raid from Java visits Cocos weekly, several Islanders are killed and Home Island homes destroyed.
1944 Major bombing raids kill two Islanders and destroys 27 Home Island houses.
John Sidney Clunies-Ross dies.
1945 Several thousand British servicemen build and operate a RAF bomber base and Air Staging Post on West Island. The bomber and fighter planes of 11 RAF squadrons are based on Cocos Islands until the end of WW2.
Operation Cockroach begins, an 1828-metre airstrip is constructed on West Island in two months. During peak of runway construction 8300 military personnel are on Cocos.
1946 John Sidney Clunies-Ross's widow returns to Cocos with son John Cecil Clunies-Ross.
1949 John Cecil Clunies-Ross commences as ruler of Cocos Islands.
1951 The Australian Government purchases 367 acres for an aerodrome on West Island. 500 RAAF commence airstrip construction.
1952 Qantas begins commercial flights through Cocos to Johannesburg and Singapore.
1954 The Queen visits Cocos Islands on Britannia.
1955 Cocos (Keeling) Islands 'officially' becomes an Australian Territory; Australian Government establishes a permanent presence on West Island.
1966 OTC Telegraph Cable Station on Direction Island ceases operation.
1969 John Cecil Clunies-Ross seeks Home Rule (internal self government).
1973 Australia invites UN committee of 24 to visit and report on the Cocos Islands.
1978 The Australian Government purchases all of the Clunies-Ross land on Cocos Islands for Australian $6.25 million, less lot 14 (Home Island) and 5 hectares surrounding it.
1979 The Cocos Islands Workers Co-Operative Society is established as the commercial arm of the community, to run copra industry, building construction, maintenance and stevedoring.
1980 The island's copra industry ceases operation.
A second UN visiting mission is sent to the islands; legislation for compulsory education of Cocos residents is introduced.
1981 Animal Quarantine Station commences on West Island.
1984 A third UN Mission watches as Cocos Malay people vote to integrate with Australia.
2014 100 Year anniversary of Australia's first Naval battle victory between HMAS Sydney and the SMS Emden German raider