73rd Brigade (United Kingdom)
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The 73rd Brigade was an infantry brigade formation of the British Army that served in both the First and the Second World Wars.
Order of battle

The 73rd Brigade was originally raised during the First World War in September 1914 from men volunteering for Lord Kitchener's New Armies, and was assigned to the 24th Division. The brigade consisted of battalions from the East of England and spent the early months of its existence training. The brigade, with the division, departed for the Western Front in August 1915, fighting in many of the major battles of the war, such as the Battle of Loos, the Battle of the Somme, the Battle of Vimy Ridge, Battle of Passchendaele and in the German spring offensive and the Hundred Days Offensive, which saw the war come to an end on 11 November 1918 . The brigade had suffered extremely heavy casualties during the war and was disbanded in late March 1919.
The brigade was constituted as follows during the war: [1]
- 12th (Service) Battalion, Royal Fusiliers (City of London Regiment) (left October 1915)
- 9th (Service) Battalion, Royal Sussex Regiment
- 7th (Service) Battalion, Northamptonshire Regiment
- 13th (Service) Battalion, Duke of Cambridge's Own (Middlesex Regiment)
- 2nd Battalion, Prince of Wales's Leinster Regiment (Royal Canadians) (from October 1915, left February 1918)
- 73rd Machine Gun Company, Machine Gun Corps (formed 14 March 1916, moved to 24th Battalion, Machine Gun Corps 5 March 1918)
- 73rd Trench Mortar Battery (formed 15 June 1916)