|Place of birth||Wandong, Victoria|
|School||James Street State School, Perth, Western Australia|
|Religion||Church of England|
|Address||Tenth Avenue, Maylands, Western Australia|
|Age at embarkation||20|
|Next of kin||Carl Siefken, Tenth Avenue, Maylands, Western Australia|
|Previous military service||Served for 3 years as a Bugler in the 11th Western Australian Infantry Regiment, Citizen Military Forces.|
|Date of enlistment from Nominal Roll|
|Place of enlistment||Blackboy Hill, Western Australia|
|Rank on enlistment||Bugler|
|Unit name||11th Battalion, C Company|
|AWM Embarkation Roll number||23/28/1|
|Embarkation details||Unit embarked from Fremantle, Western Australia, on board HMAT A11 Ascanius on
|Rank from Nominal Roll||Private|
|Unit from Nominal Roll||3rd Machine Gun Company|
|Fate||Died whilst a Prisoner of War
|Place of death or wounding||Gerdauen, Germany|
|Age at death||23|
|Age at death from cemetery records||23|
|Place of burial||Berlin South-Western Cemetery (Plot XV, Row B, Grave No. 10), Stahnsdorf, Germany|
|Panel number, Roll of Honour,|
Australian War Memorial
|Miscellaneous information from|
|Parents: Carl and Caroline SIEFKEN. Native of Wandong, Victoria|
|Family/military connections||Brother: 4899 Pte Carl William SIEFKEN, 51st Bn, returned to Australia, 28 February 1919.|
War service: Egypt, Gallipoli, Western Front
Embarked, 3 October 1914; disembarked Egypt, 8 December 1914.
Embarked to join the Mediterranean Expeditionary Force (Gallipoli Campaign), 2 March 1915.
Evacuated to hospital, 16 August 1915; admitted to HS 'Ascania', Mudros, 19 August 1915; disembarked Malta, 25 August 1915, and transferred to St David's Military Hospital the same day; to England, 5 September 1915; to hospital, Fulham, 14 September 1915 (influenza, and diarrhoea).
Found guilty, 3rd Training Bn, Perham Downs, 18 July 1916, of being absent from 1400 hours parade: awarded 3 days' confined to camp.
Proceeded overseas to France, 25 July 1916; marched into 1st Australian Divisional Base Depot, Etaples, 26 July 1916.
Proceeded to unit, 8 August 1916; rejoined 11th Bn, 9 August 1917.
Transferred to, and taken on strength of 3rd Machine Gun Company, 11 February 1917.
Posted as 'Missing in Action', 15 April 1917.
Now, 6 July 1917, reported as 'Prisoner of War, 15 April 1917, and interned Limburg, Germany'.
Died, Gerdauen, East Prussia, 21 October 1918 (pneumonia and influenza).Medals: 1914-15 Star, British War Medal, Victory Medal
|Miscellaneous details||Surname entered incorrectly on Embarkation Roll as SIEFKIN.|
|Sources||NAA: B2455, SIEFKEN Otto John|