The term 'Australian Weapon' can be broken down into three crossword solutions: KOALA (5 letters), EMUS (4 letters), and EMU (3 letters). Koalas are a species of marsupial native to Australia, and they are often seen as a symbol of the country. Emus are large, flightless birds that are also native to Australia. The EMU is the largest bird in Australia and the second-largest in the world after the ostrich. Finally, the EMU is the national bird of Australia. All three of these animals are considered to be iconic symbols of Australia and are often used to represent the country.