| Albert Otto Walter Mayer | |
| Birth Date: | 24 April 1892 |
| Placeofburial: | Illfurth German Military Cemetery, Alsace, France |
| Birth Place: | Magdeburg, Saxony-Anhalt, German Empire |
| Death Place: | Joncherey, Territoire de Belfort, France |
| Serviceyears: | 1912 - 14 |
| Rank: | Leutnant |
| Unit: | Jäger Regt-zu-Pferd Nr 5, 29th Cavalry Brigade, 29th Infantry Division |
| Battles: | World War I |
Albert Otto Walter Mayer (24 April 18922 August 1914) was the first soldier of Imperial German Army and first soldier of the world to die in World War I. He died one day before the German Empire formally declared war on France, in the same skirmish in which Jules-André Peugeot became the first French soldier to die.
Albert Otto Walter Mayer was born on 24 April 1892 at Magdeburg, Saxony-Anhalt. His family had moved to the area of Mulhouse, Alsace, when he was a boy. He enlisted into the Imperial German Army in 1912. In August 1914, he was a lieutenant in his local cavalry unit, the Jäger Regt-zu-Pferd Nr 5, which was part of the 29th Cavalry Brigade of the 29th Infantry Division, garrisoned in Mulhouse.[1]
See main article: Skirmish at Joncherey.
During the morning of 2 August 1914, a cavalry patrol led by Mayer crossed into France before war had been officially declared. Upon entering French territory, the patrol was confronted by a French Army sentry, who escaped after Mayer attacked him with his sabre. Around 9.30 a.m., the German patrol entered the village of Joncherey. French soldiers billeted nearby were notified and deployed to confront the German intruders. At 10:00 a.m., Corporal Jules-André Peugeot, leading the French troops, saw the German force and shouted a command to stop as they were under arrest, to which Mayer pulled out his pistol and shot at Peugeot, hitting him in the shoulder and mortally wounding him. Peugeot, in turn, fired his weapon at Mayer but missed. Other soldiers of Peugeot's detachment then opened fire at the Germans, hitting Mayer in the stomach and head, killing him, with the remainder of the German patrol fleeing the scene.
Mayer's body was buried in Joncherey the next day. The body was later removed to the German military cemetery at Illfurth near Mulhouse, where his gravestone is marked with the inscription "1st German Casualty of the World War 1914–18". His helmet was retrieved by the French authorities and today is on display at the Musée de l'Armée in Paris.