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| 23rd Brigade (Australia) | |
|---|---|
| Unit name | 23rd Brigade |
| Dates | 1912–1918, 1921–1945 |
| Country | Australia |
| Branch | Australian Army |
| Type | Brigade |
| Role | Infantry |
| Size | Approx. 3,000–4,000 personnel |
| Command structure | 3rd Division (Australia); later 8th Division (Australia) elements |
| Garrison | Townsville, Brisbane |
| Notable commanders | Brigadier General John Monash, Brigadier Arthur Allen |
| Battles | Gallipoli Campaign, Western Front (World War I), Kokoda Track campaign, New Guinea campaign, Borneo campaign (1945) |
23rd Brigade (Australia) The 23rd Brigade was an Australian Army infantry formation raised during the early twentieth century that served in both First World War and Second World War eras. It saw action on the Western Front (World War I), later formed part of Australia's Militia and Australian Imperial Force organizations, and participated in Pacific campaigns including New Guinea campaign and Borneo campaign (1945). The brigade's history intersects with major Australian formations, theatres, and commanders of the twentieth century.
The brigade originated in pre‑war Australian defence arrangements tied to the Defence Act 1903 (Cth) and the introduction of the Universal Training Scheme, being constituted within the citizen forces alongside formations such as the 1st Division (Australia) and 2nd Division (Australia). Early officers and non‑commissioned personnel drew from units in Queensland, New South Wales, Victoria and South Australia, with peacetime training using locales like Enoggera and Royal Military College, Duntroon. Its peacetime establishments linked to militia brigades such as the Queensland Volunteer Rifles and drew cadre from battalions with lineage to the Boer War volunteer contingents and pre‑Federation colonial units.
During the First World War, personnel associated with the brigade served within the Australian Imperial Force structure, contributing cadres and reinforcements to brigades on the Gallipoli Campaign and the Western Front (World War I). Elements and veterans transferred to units engaged at battles including Pozières, Bullecourt, Passchendaele, and the Hindenburg Line, serving under senior leaders from the AIF such as John Monash and interacting with formations like the Australian Corps and the British Expeditionary Force. The brigade's identity was shaped by the AIF's expeditionary doctrine, heavy casualties at Somme‑related operations, and the post‑1918 demobilisation associated with the Armistice of 11 November 1918.
In the interwar period the brigade was reconstituted within the Citizen Military Forces under the Defence Act 1903 (Cth) framework and linked to divisional structures including the 3rd Division (Australia), reflecting reorganisation driven by the Washington Naval Treaty strategic environment and budgetary pressures shaped by the Great Depression. The 1920s and 1930s saw the brigade associated with battalions raised in Townsville, Brisbane, and regional depots, adapting peacetime training doctrines influenced by the British Army staff system and observers from Royal Australian Navy and Royal Australian Air Force cooperation experiments. The rise of tensions in the Asia‑Pacific, highlighted by events such as the Mukden Incident and the Second Sino‑Japanese War, prompted reassessment of Militia readiness and partial mobilisation measures.
With the outbreak of the Second World War, the brigade was mobilised within Australia's territorial defence, mobilising for garrison and later expeditionary duties alongside formations including the 8th Division (Australia) and units transferred to the Australian Imperial Force (Second AIF). It undertook defensive operations in northern Australia, contributed to campaigns in Papua New Guinea such as engagements during the Kokoda Track campaign, and supported offensives in the New Guinea campaign and Borneo campaign (1945). Operating in jungle, riverine and amphibious environments, the brigade cooperated with formations like 1st Australian Corps, received logistic support from Royal Australian Navy vessels and Royal Australian Air Force squadrons, and faced Japanese units influenced by Imperial Japanese Army (1931–1945). Commanders oversaw coordinated operations involving engineers, intelligence sections drawing on Allied Intelligence Bureau analyses, and combined arms planning derived from lessons at Tobruk and El Alamein.
After Victory in the Pacific the brigade was gradually disbanded during the postwar demobilisation and restructuring that created the Australian Regular Army and revised reserve forces under the national service schemes. Veterans entered civilian life, influencing commemorations such as ANZAC Day and contributing to histories preserved in institutions like the Australian War Memorial and state museums in Queensland and New South Wales. The brigade's battle honours and traditions were perpetuated in successor reserve formations and are cited in regimental histories alongside narratives featuring figures like Brigadier Arthur Allen and organisations such as the Returned and Services League of Australia. Its operational lessons informed postwar doctrine, Cold War era readiness, and Australia's contribution to later multinational operations including deployments under United Nations mandates and alliances such as the ANZUS Treaty.
Category:Brigades of Australia Category:Military units and formations established in 1912 Category:Military units and formations disestablished in 1945