Welcome

Today's Honour Roll

May
20
Today's Honour Roll recognizes 177 Australians who fell on this day in history.
See Full List
Name Date of Death Conflict
HARSTON, Alfred Linacre (MM) 20 May 1918 World War 1
HOLLINGWORTH, Thomas Henry Montague 20 May 1915 World War 1
THORBJORNSEN, Charles George 20 May 1941 World War 2
HERPS, John Raymond Wilbur 20 May 1945 World War 2
MURRAY, Owen Keith 20 May 1915 World War 1

The ‘Dambusters’ Raid – 16 May 1943

The ‘Dambusters’ Raid – 16 May 1943

In late March 1943, a special squadron was formed comprising of 133 men from Britain, Canada, New Zealand, the United States and Australia.[i] No. 617 Squadron RAF began intensive, low-level night flight training in preparation for a one-off, surprise attack.[ii] The mission, codenamed Operation Chastise, was to bomb three dams, the Möhne, Eder and Sorpe, located in Germany’s Ruhr Valley.[iii]

First, an effective weapon had to be developed. Dr Barnes Wallis, assistant chief designer at the Vickers Aircraft Company, created the ingenious ‘Upkeep’ bouncing bomb, a drum-shaped bomb capable of skipping over the surface of the water, rolling down the edge of the dam wall and exploding at its base.[iv]


The Upkeep mine loaded aboard Guy Gibson’s Lancaster with a modified brace
VWMA No. 617 Squadron RAF

Operation Chastise took place on the night of 16 May, when 19 Lancasters took off in three separate waves under the command of 24-year-old Wing Commander Guy Gibson (who would win a Victoria Cross for his efforts during the raid). Thirteen of these airmen were Australian, including three South Australians.[v]

The first wave attacked the Möhne and Eder Dams, successfully breaching both walls and causing devastating flooding in the Ruhr Valley. Four of the nine crews in the first wave did not return. Lancaster ‘L for Leather’ (each plane had its own alphabetical call sign) was piloted by 20-year-old South Australian David John Shannon, the youngest pilot on the raid. His crew returned to base safely, and Shannon was awarded the Distinguished Service Order for his bravery.[vi] Having previously been awarded the Distinguished Flying Cross, the addition of a DSO made Shannon the highest decorated member of the RAAF at the time[vii] – all before his 21st birthday. Shannon added a Bar to his DFC in November 1943 for his work during the Dortmund-Ems canal attacks.[viii]


Lancaster bomber pilot Dave Shannon before the Dam Busters raid
AWM SUK10670

The second and third waves were not as successful as the first; all crews failed to breach the Scrope Dam. Regardless, the damage was done. The Möhne breach alone caused flooding 76 meters wide and 89 meters deep in the valley, destroying factories, houses, roads, bridges and mines.[ix] Over 1,600 people were killed as a result, including prisoners, forced labourers and civilians,[x] a devastating price to pay for an overwhelming tactical and morale boosting Allied victory.


The Möhne Dam after the Dambusters raid
AWM 148949

No. 617 Squadron remained a specialist bombing unit after the raid, their motto: Après moi le déluge (After me the flood).[xi]



[i] Larkins, S 2018, No. 617 Squadron RAF, Virtual War Memorial, [online] Available at: .
[ii] Veterans SA 2018, 75th Anniversary of the Dambusters Raid, [online] Available at: .
[iii] Ibid.
[iv] Ibid.
[v] Ibid.
[vi] Australian War Memorial 2021, Fifty Australians – Dave Shannon, [online] Available at: < https://www.awm.gov.au/visit/exhibitions/fiftyaustralians/44>.
[vii] Ibid.
[viii] Ibid.
[ix] VWMA
[x] BBC 2017, On This Day – 1943: RAF raid smashes German dams, [online] Available at: .
[xi] Brickhill, P 1951, The Dam Busters: An Account of 617 Squadron, R.A.F., 1943–45, with plates, Evans Bros, London, p. 84.