November 1915 503rd (2/1st Wessex) Field Co, RE – joined from 45th (2nd Wessex) Division February 1916 504th (2/2nd Wessex) Field Co, RE – joined from 45th (2nd Wessex) Division February 1916 1/1st London Signal Co, RE – rejoined 56th (1st London) Division February 1916 58th (2/1st Wessex) Signal Co, RE – joined from 45th (2nd Wessex) Division February 1916 Pioneers 4th Bn Suffolk Regiment – joined February 1918 from 33rd Division Machine Guns 206th Co, MGC – joined March 1917 58th Bn, MGC – formed March 1918 from 214th, 198th, 215th and 206th Cos 100th (Warwickshire & South Nottinghamshire Yeomanry) Bn, MGC – attached 7–25 September 1918 Medical 2/1st London Field Ambulance, Royal Army Medical Corps (RAMC) – rejoined 56th (1st London) Division February 1916 2/2nd London Field Ambulance, RAMC – rejoined 56th (1st London) Division February 1916 2/3rd London Field Ambulance, RAMC – rejoined 56th (1st London) Division February 1916 2/1st Home Counties Field Ambulance, RAMC – joined from 67th (2nd Home Counties) Division February 1916 2/2nd Home Counties Field Ambulance, RAMC – joined from 67th (2nd Home Counties) Division February 1916 2/3rd Home Counties Field Ambulance, RAMC – joined from 67th (2nd Home Counties) Division February 1916 58th Sanitary Section – left to take over No 8 Sanitary Area, VIII Corps, 30 March 1917 Veterinary 58th (2/1st London) Mobile Veterinary Section, Army Veterinary Corps – joined November 1915 Labour 249th Divisional Employment Co, Labour Corps – formed June 1917 Supply 58th (2/1st London) Divisional Train, Army Service Corps (ASC) 509th Horse Transport Co, ASC 510th Horse Transport Co, ASC 511th Horse Transport Co, ASC 512th Horse Transport Co, ASC Attached 1/10th (County of London) Bn, London Regiment (Paddington Rifles) – joined from 1st London Division; left April 1915 1/11th (County of London) Bn, London Regiment (Finsbury Rifles) – joined from 1st London Division; left April 1915 Actions The division was engaged in the following actions: 1917 German Retreat to the Hindenburg Line (17–28 March) Battle of Arras 2nd Battle of Bullecourt (4–17 May) – 175 Bde with 2nd Australian Division, 173 Bde with 5th Australian Division Actions of the Hindenburg Line (20 May–16 June) 3rd Battle of Ypres Battle of the Menin Road Ridge (20–25 September) Battle of Polygon Wood (26–27 September) Second Battle of Passchendaele (26 October– 10 November) 1918 German spring offensive (21 March–3 April) Battle of St Quentin (21–23 March) Battle of the Avre