Chips Dubbo

Private First Class Chips Dubbo (voiced by Andrew McKaige) is an Australian Marine in Halo: Combat Evolved. His distinctive dialect, unmistakable smart remarks and laid-back attitude make him instantly recognizable. A similar Marine, voiced by the same actor, is present in Halo 2.

Observant players of Halo will notice that the character model for Private Dubbo is different between Halo and Halo 2.

Trivia
There is actually an Australian town called Dubbo in the State of New South Wales. Two ships in the Australian Navy are named after the town:
 * HMAS Dubbo (J-251/M-251) was a Bathurst class corvette sold for scrap in 1958
 * HMAS Dubbo (P-214) is a Fremantle class patrol boat.Wikipedia Dubbo Link

Australian players of Halo are often critical of Dubbo's accent, often suggesting that it is that of an American attempting an Australian accent and failing. Dubbo's voice actor, Andrew McKaige, is actually an Australian actor, with many Australian acting credits to his name including dramas, such as The Secret Life of Us and All Saints, and soap operas such as Sons and Daughters, Neighbours, and Paradise Beach.