Biography

Birth date: 02 May 1875
Birth place: Australia: New South Wales, Sydney, Camden
Death date: 12 September 1931
Death place: Australia: New South Wales, Sydney, Camden
Final rank: Brigadier General
Conflict: First World War, 1914-1918
Units:
  • 5th Australian Light Horse Brigade
  • 7th Australian Light Horse Regiment

Rolls and Awards

Honours and Awards (Recommendation)

  • Unit: 7th Australian Light Horse Regiment
  • Conflict: First World War, 1914-1918

Honours and Awards (Recommendation) : Companion of the Order of the Bath

  • Unit: 7th Australian Light Horse Regiment
  • Conflict: First World War, 1914-1918

Honours and Awards : Egyptian Order of the Nile, Third Class

  • Unit: 7th Australian Light Horse Regiment
  • Conflict: First World War, 1914-1918

Honours and Awards : Mention in despatches

  • Unit: 7th Australian Light Horse Regiment
  • Conflict: First World War, 1914-1918

Honours and Awards : Companion of the Order of St Michael and St George

  • Unit: 7th Australian Light Horse Regiment
  • Conflict: First World War, 1914-1918

Honours and Awards : Mention in despatches

  • Unit: 5th Australian Light Horse Brigade
  • Conflict: First World War, 1914-1918

Honours and Awards : Distinguished Service Order

  • Unit: 7th Australian Light Horse Regiment
  • Conflict: First World War, 1914-1918

Collection Items

Photograph

A02902

The outer wall of the ruined Temple of Bacchus. Brigadier General G M M Onslow, Commanding Officer of the 5th Australian Light Horse Brigade is standing near the leaning pillar. This is one half of a stereo image. The full image is held at A02902A.

A02902

A00381

Horses being watered from wells in Katia Hod. Colonel Onslow is studying map while sitting on a tree stump (right).

A00381

A00406

"Onslow's spider". A reference to a spider in relation to Colonel George Macleay Macarthur-Onslow, Commander of the 7th Light Horse Regiment.

A00406

B00384

Outdoors group portrait of Brigadier General G M Macarthur Onslow, Commander of the 5th Australian Light Horse Brigade, 1918-1919, and unidentified Headquarters' staff, in front of a tent.

B00384

G01289

A game of cricket was played on Shell Green in an attempt to distract the Turks from the imminent departure of allied troops. Major George Macarthur Onslow of the Light Horse in batting, is being caught out. Shells were passing overhead all the time the game was in progress.

G01289

H17862B

Kincumber, New South Wales. 20 December 1919. Brigadier General Macarthur Onslow unveiling A WW1 War Memorial.

H17862B

J02529

GALLIPOLI, TURKEY. OFFICERS OF THE 2ND A.L.H. BRIGADE OUTSIDE BRIGADE HEADQUARTERS ON SHELL GREEN. (L. TO R.) LT.-COL. MACARTHUR ONSLOW, CAPT. STANLEY (SIGNAL TROOP), CAPT. O'HARA (A.M.C.), AND MAJOR FOSTER (BRIGADE MAJOR.) (DONATED BY LT.-COL. A.M. MARTYN.)

J02529

A03049

Group portrait of some of the original and 1st Reinforcement officers of the 7th Light Horse Regiment at Maadi. Identified left to right, back row: Second Lieutenant (2nd Lt) Alan Thorne, C Squadron (later Lt, killed in action 27 April 1915); 2nd Lt John Oswald Stevenson C Squadron (later Captain...

A03049

P01541.008

Group portrait of five officers, left to right, back: Lieutenant Colonel (Lt Col) Cecil Horace Granville, 1st Light Horse Regiment; Lt Col Lachlan Chisholm Wilson, 5th Light Horse Regiment; Lt Col George Macleay Macarthur-Onslow DSO (1 January 1917), 7th Light Horse Regiment. Front row: Lt Col...

P01541.008

A03047

An informal group portrait of some of the 7th Light Horse Regiment officers, taken with the Brigade Headquarters staff at Hill 70, Egypt July 1916. Back row, left to right: Lieutenant (Lt) James Dalton; Captain (Capt) Keith Bruce Suttor; Major (Maj) Louis Walter Davies MC; Major (Maj) Edward...

A03047

P00228.054

Group portrait of the officers of left to right, standing: Lieutenant Colonel (Lt Col) George Macleay Macarthur-Onslow DSO (1 January 1917), 7th Light Horse Regiment, and Lt Col Thomas John Todd, 10th Light Horse Regiment. Seated: Lt Col McDonald; Lt Col George Richard Wilson, 11th Light Horse...

P00228.054

Art

Lieutenant-Colonel George Macarthur-Onslow

Depicts a portrait of Lieutenant-Colonel George Macarthur-Onslow of Camden NSW who commanded the 7th Light Horse Regiment until August 1918 when he took command of the newly formed 5th Light Horse Brigade (Gullett 640-641). He was born at Camden Park, Menangle, 2 May 1875 and died 12 September...

ART02743

Leaders of the Australian Light Horse in Palestine, 1918

Jordan Valley; 1st, 2nd, 3rd, 4th and 5th Australian Light Horse Brigades; a group of ten officers, all mounted, in a desert landscape, l-r: Brigadier General George Macleay Macarthur-Onslow, DSO, 5 ALH Bde; Brigadier General William Grant, DSO, 4 ALH Bde; Lieutenant Colonel John Gilbert Browne,...

ART09557

Private Record

Heraldry

Hejaz flag

Rectangular flag divided into even horizontal stripes of black (top) green (centre) and white (bottom), with a red triangular hoist. The black section is made from cotton twill, the green section from wool bunting and the white section from plain weave cotton. The red triangular hoist is also made...

RELAWM16513

Timeline

Date of birth 1875-05-02
Date commissioned 1895-04-05 Commissioned as a second lieutenant in the New South Wales Mounted Rifles.
Date promoted 1896 Promoted to lieutenant.
Other 1903 Became a lieutenant in the 2nd Light Horse.
Date promoted 1911 Promoted to captain.
Date promoted 1914-02-16 Promoted to major, commanding the 9th Light Horse Regiment.
Other units 1914-08 Designated commander of the 1st Light Horse Regiment.
Date and unit at appointment (Officers) 1914-11-01 Appointed to the AIF again, as deputy commander of the 7th Light Horse Regiment.
Other units 1915-08-18 - 1918-09-02 Commanding Officer of the 7th Light Horse Regiment.
Date promoted 1915-11-22 Promoted to lieutenant colonel.
Other 1915-12-17 Organised the cricket match at Shell Green.
Date of honour or award 1916-08 Mention in Despatches and awarded the Distinguished Service Order.
Date wounded 1916-08-05 Severely wounded at Katia and evacuated.
Other units 1918-05-01 - 1918-08-01 Acting commander of the 2nd Light Horse Brigade.
Other units 1918-09-03 Took command of the newly formed 5th Light Horse Brigade with the temporary rank of brigadier general.
Other 1919-01 Evacuated with typhoid.
Date of honour or award 1919-05 For his service in Palestine, he was twice Mentioned in Despatches and appointed a Companion of St Michael and St George (CMG).
Date returned to Australia 1919-05
Other 1920 After the was, he was elected councillor for Wolindilly Shire, alderman of Camden City Council and mayor of Camden.
Other 1920 - 1923 Aide de Camp to the Governor General.
Other 1927 - 1931 Commanded the 1st Cavalry Division.
Date of death 1931-09-12