In 1932, Australia sent machine guns to fight emus. The emus won.
About 20,000 emus were wrecking wheat farms in Western Australia. The army sent two Lewis guns and 10,000 rounds. A month later, the soldiers went home.
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Sources: Operation ran 2 Nov to 10 Dec 1932 in the Campion district. Major G. P. W. Meredith reported 986 emus killed with close to 10,000 rounds.