First attempt

On 2 November the men travelled to Campion, where some 50 emus were sighted.[2] As the birds were out of range of the guns, the local settlers attempted to herd the emus into an ambush, but the birds split into small groups and ran so that they were difficult to target.[6] Nevertheless, while the first fusillade from the machine guns was ineffective due to the range, a second round of gunfire was able to kill "a number" of birds. Later the same day a small flock was encountered, and "perhaps a dozen" birds were killed.[2]

The next significant event was on 4 November. Meredith had established an ambush near a local dam, and more than 1,000 emus were spotted heading towards their position. This time the gunners waited until the birds were in close proximity before opening fire. The gun jammed after only twelve birds were killed and the remainder scattered before any more could be killed.[8] No more birds were sighted that day.[2]

In the days that followed Meredith chose to move further south where the birds were "reported to be fairly tame",[11] but there was only limited success in spite of his efforts.[2] At one stage Meredith even went so far as to mount one of the guns on a truck: a move that proved to be ineffective, as the truck was unable to gain on the birds, and the ride was so rough that the gunner was unable to fire any shots.[2] By 8 November, six days after the first engagement, 2,500 rounds of ammunition had been fired.[6] The number of birds killed is uncertain: one account claims just 50 birds,[6] but other accounts range from 200 to 500—the latter figure being provided by the settlers. Meredith's official report noted that his men had suffered no casualties.[2]

Summarizing the culls, ornithologist Dominic Serventy commented:

The machine-gunners' dreams of point blank fire into serried masses of Emus were soon dissipated. The Emu command had evidently ordered guerrilla tactics, and its unwieldy army soon split up into innumerable small units that made use of the military equipment uneconomic. A crestfallen field force therefore withdrew from the combat area after about a month.[12]

On 8 November, representatives in the Australian House of Representatives discussed the operation.[6] Following the negative coverage of the events in the local media,[13] that included claims that "only a few" emus had died,[4] Pearce withdrew the military personnel and the guns on 8 November.[4][6][14][15]

After the withdrawal, Major Meredith compared the emus to Zulus and commented on the striking manoeuvrability of the emus, even while badly wounded.

If we had a military division with the bullet-carrying capacity of these birds it would face any army in the world... They can face machine guns with the invulnerability of tanks. They are like Zulus whom even dum-dum bullets could not stop.[16]

Second attempt

After the withdrawal of the military, the emu attacks on crops continued. Farmers again asked for support, citing the hot weather and drought that brought emus invading farms in the thousands. James Mitchell, the Premier of Western Australia lent his strong support to renewal of the military assistance. Additionally, a report from the Base Commander indicated that 300 emus had been killed in the initial operation.[15]

Acting on the requests and the Base Commander's report, by 12 November the Minister of Defence approved a resumption of military efforts.[15] He defended the decision in the senate, explaining why the soldiers were necessary to combat the serious agricultural threat of the large emu population.[4] Although the military had agreed to lend the guns to the Western Australian government on the expectation that they would provide the necessary people, Meredith was once again placed in the field due to an apparent lack of experienced machine gunners in the state.[2]

Taking to the field on 13 November 1932, the military found a degree of success over the first two days, with approximately 40 emus killed. The third day, 15 November, proved to be far less successful, but by 2 December the guns were accounting for approximately 100 emus per week. Meredith was recalled on 10 December, and in his report he claimed 986 kills with 9,860 rounds, at a rate of exactly 10 rounds per confirmed kill. In addition, Meredith claimed 2,500 wounded birds had died as a result of the injuries that they had sustained.[2]

(http://www.autoadmit.com/thread.php?thread_id=3767191&forum_id=2#34466800)