The Emu War, also known as the Great Emu War, was a nuisance wildlife management military operation undertaken in Australia over the latter part of 1932 to address public concern over the number of emus said to be running amok in the Campion district of Western Australia. The unsuccessful attempts to curb the population of emus, a large flightless bird indigenous to Australia, employed soldiers armed with Lewis guns—leading the media to adopt the name "Emu War" when referring to the incident. While a number of the birds were killed, the emu population persisted and continued to cause crop destruction. Following World War I, large numbers of discharged veterans who served in the war were given land by the Australian government to take up farming within Western Australia, often in marginal areas. With the onset of the Great Depression in 1929, these farmers were encouraged to increase their wheat crops, with the government promising—and failing to deliver—assistance in the form of subsidies. In spite of the recommendations and the promised subsidies, wheat prices continued to fall, and by October 1932 matters were becoming intense, with the farmers preparing to harvest the season's crop while simultaneously threatening to refuse to deliver the wheat.
The difficulties facing farmers were increased by the arrival of as many as 20,000 emus. Emus regularly migrate after their breeding season, heading to the coast from the inland regions. With the cleared land and additional water supplies being made available for livestock by the Western Australian farmers, the emus found that the cultivated lands were good habitat, and they began to foray into farm territory—in particular the marginal farming land around Chandler and Walgoolan. The emus consumed and spoiled the crops, as well as leaving large gaps in fences where rabbits could enter and cause further problems.
Farmers relayed their concerns about the birds ravaging their crops, and a deputation of ex-soldiers were sent to meet with the Minister of Defence, Sir George Pearce. Having served in World War I, the soldier-settlers were well aware of the effectiveness of machine guns, and they requested their deployment. The minister readily agreed, although with conditions attached: the guns were to be used by military personnel, troop transport was to be financed by the Western Australian government, and the farmers would provide food, accommodation, and payment for the ammunition. Pearce also supported the deployment on the grounds that the birds would make good target practice, while it has also been argued that some in the government may have viewed the operation as a way of being seen to be helping the Western Australian farmers, to stave off the secession movement that was brewing. Towards that end, a cinematographer from Fox Movietone was enlisted.Military involvement was due to begin in October 1932. The "war" was conducted under the command of Major G. P. W. Meredith of the Seventh Heavy Battery of the Royal Australian Artillery, with Meredith commanding soldiers Sergeant S. McMurray and Gunner J. O'Halloran, armed with two Lewis guns and 10,000 rounds of ammunition. The operation was delayed, however, by a period of rainfall that caused the emus to scatter over a wider area. The rain ceased by 2 November 1932, whereupon the troops were deployed with orders to assist the farmers and, according to a newspaper account, to collect 100 emu skins so that their feathers could be used to make hats for light horsemen.
Despite the problems encountered with the cull, the farmers of the region once again requested military assistance in 1934, 1943, and 1948, only to be turned down by the government. Instead, the bounty system that had been instigated in 1923 was continued, and this proved to be effective: 57,034 bounties were claimed over a six-month period in 1934.
By December 1932, word of the Emu War had spread, reaching the United Kingdom. Some conservationists there protested the cull as "extermination of the rare emu". Dominic Serventy and Hubert Whittell, the eminent Australian ornithologists, described the "war" as "an attempt at the mass destruction of the birds".
Throughout 1930 and onward, exclusion barrier fencing became a popular means of keeping emus out of agricultural areas (in addition to other vermin, such as dingoes and rabbits).
In November 1950, Hugh Leslie raised the issues of emus in federal parliament and urged Army Minister Josiah Francis to release a quantity of .303 ammunition from the army for the use of farmers. The minister approved the release of 500,000 rounds of ammunition.