1916.
Le Pretre Wood.
1. Until the beginning of October, 1916, the 8th Ersatz Division occupied the sector of the Pretre wood, north of Fey en Haye. In August it lost the 364th Infantry Regiment, assigned to the 33d Reserve Division, and on September 20 the 363d, which entered into the composition of the 214th Division. It received a new regiment, the 400th Infantry Regiment, formed in September by drafts upon its infantry units.
Somme.
2. Leaving the 400th Infantry Regiment in Haye, and composed of three regiments (365th Infantry Regiment, 51st and 52d Ersatz Regiments), the 8th Ersatz Division went to the Somme on October 3. After a rest in the vicinity of Le Catelet until the 10th it went into the sector east of south of Bouchavesnes, where it did not take part in any important action.
Lorraine.
3. Relieved on November 18, it returned to Lorraine at Fey en Haye. It went into line southeast of Thiaucourt November 25, where the 400th Infantry Regiment was again assigned to the division.
1917.
1. The 8th Ersatz Division remained on the Lorraine front, southeast of Thiaucourt, until about May 10, 1917. In February the 400th Infantry Regiment was sent to Russia.
At the beginning of May the division underwent several changes—it gave the 365th Infantry Regiment to the 5th Landwehr Division and received the 122d Fusileer Regiment (Wurttemberg) from the 105th Division. The 51st and 52d Ersatz Regiments received the 478th and 479th. The 8th Ersatz Division, already called Wurttemberg, then became the 243d Division.