'On This Day' from culturepics.org

AERIAL PHOTOGRAPHY ON THE WESTERN FRONT DURING THE FIRST WORLD WAR
18 July 1915
Imperial War Museum

DESTRUCTION ON THE WESTERN FRONT, 1914-1918
18 July 1915
Imperial War Museum

Lance Corporal Jaines Thomas Lilburne 1569. Unit: B Company, 3rd Reinforcements, 5th Battalion, Australian Imperial Force.. Death: 18 July 1915 Gallipoli
Died 18 July 1915
Imperial War Museum

On the field-path from Wisques to Saint-Omer
18 July 1915
Imperial War Museum

THE FRENCH ARMY ON THE WESTERN FRONT, 1914-1918
18 July 1915
Imperial War Museum

Lance Corporal Linley of B Company was reported missing on 18 July 1916 during the Battle of the Somme. He is commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Lance Sergeant Claude Fitzgerald Burton 1916. Unit: D Company, 1st Regiment, South African Infantry. Death: 18 July 1916.
Died 18 July 1916
Imperial War Museum

Lance Sergeant Claude Fitzgerald S. Burton 1916. Unit: 4th Platoon, "A" Company, 1st Regiment, South African Infantry; previously with the Cape Peninsula Rifles. Death: 18 July 1916, missing in action at Delville Wood, Somme, Western Front. Commemorated o
Died 18 July 1916
Imperial War Museum

Lt Tlndal was reported wounded and missing, aged 19, at Delville Wood on 18 July 1916 during the Battle of the Somme. He is commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Private Albert G. Mitchell S/10039. Unit: Grenade Section, 1st Battalion, Gordon Highlanders. Death: 18 July 1916, missing, Western Front.
Died 18 July 1916
Imperial War Museum

Private Eden Lashley Hall 4105. Unit: 6th Platoon, "B" Company, 1st Regiment, South African Infantry. Death: 18 July 1916, missing in action, Somme, Western Front. Commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Private George Scott S/9033. Unit: 8th Battalion, Black Watch (Royal Highlanders). Death: 18 July 1916 Missing at Delville Wood Western Front
Died 18 July 1916
Imperial War Museum

Private Guy Alexander Harrison 83. Unit: 11th Platoon, "C" Company, 1st Regiment, South African Infantry. Death: 18 July 1916, missing in action on 17 July 1916 at Delville Wood, Somme, Western Front. Commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Private Ivor Llewellyn Martin 4334. Unit: 6th Platoon, "B" Company, 1st Regiment, South African Infantry, South African Overseas Expeditionary Force. Death: 18 July 1916, missing, Somme, Western Front. Commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Private James Robertson S/13467. Unit: 1st Battalion, Gordon Highlanders. Death: 18 July 1916 Missing Western Front
Died 18 July 1916
Imperial War Museum

Private John Henderson S/13992. Unit: 1st Battalion, Gordon Highlanders. Death: 18 July 1916, missing in action, Somme, Western Front. Commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Private Robert Harper 3/6033. Unit: 1st Platoon, "A" Company, 1st Battalion, Gordon Highlanders. Death: 18 July 1916, wounded and missing in action, Somme, Western Front. Commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Private William Adams Stephen S/13926. Unit: 8th Platoon, B Company, 1st Battalion, Gordon Highlanders. Death: 18 July 1916 MIA at Mametz Wood Western Front
Died 18 July 1916
Imperial War Museum

Private William McGregor 3559. Unit: "D" Company, 1st Regiment, South African Infantry, South African Overseas Expeditionary Force. Death: 18 July 1916, Delville Wood, Somme, Western Front. Commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Second Lieutenant David Balfour Patrick. Unit: 11th Battalion, Highland Light Infantry, attached to the 28th Company, Machine Gun Corps (Infantry). Death: 18 July 1916, missing, Somme, Western Front. Commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

Second Lieutenant Eric Milroy. Unit: 8th Battalion, Black Watch, Machine Gun Officer. Death: 18 July 1916, missing near Delville Wood, Somme, Western Front. Commemorated on the Thiepval Memorial.
Died 18 July 1916
Imperial War Museum

AERIAL PHOTOGRAPHY ON THE WESTERN FRONT
18 July 1917
Imperial War Museum

Lt Lawson was reported missing believed killed in action, aged 25, at Longueval on 18 July 1917 during the Battle of the Somme. He is commemorated on the Thiepval Memorial.
Died 18 July 1917
Imperial War Museum

REST AND RECREATION IN THE BRITISH ARMY ON THE WESTERN FRONT, 1914-1918
18 July 1917
Imperial War Museum

Second Lieutenant Sidney Derrick Appleby. Unit: 11th Battalion, attached to 8th Battalion, The Loyal North Lancashire Regiment. Death: 18 July 1917 Hooge Western Front
Died 18 July 1917
Imperial War Museum