2. Detraining on August 12–13, 1914, northeast of Trèves, (Coblentz-Trèves railroad), entering Belgium by way of Viel-Salm on the 19th, it advanced into France by way of the Ardennes and Champagne and from there to Sompuis (west of Vitry le François, Sept. 8).
Marne.
3. Going into action on September 8 and 9 in the vicinity of Mailly, it retired by way of Mourmelon and Sept-Saulx to the east of Rheims (Moronvilliers-Vaudesincourt). It made a stand in this sector and established its position there (end of September).
1915.
Champagne.
1. The 24th Reserve Division remained in line on the Champagne front (north of Souain, south of St. Souplet-Moronvilliers) from September, 1914, until the beginning of July, 1916. In April, 1915, the 106th Reserve Infantry Regiment was transferred to the 123d Division, a new formation.
2. At the end of September, 1915, it suffered very heavy losses while opposing the French offensive.
1916.
Somme.
1. Relieved from its sector in Champagne about the beginning of July, 1916, the 24th Reserve Division was transferred to the Somme. It went into action between Longueval and Hardecourt, from the middle to the end of July.