2. After a rest in the Briey area from the end of June until July 15, the division was sent to Verdun (sector of Fumin wood) where it went into action from July 15–25 to the beginning of September. During this period it suffered heavy losses, which made it necessary to give men as replacements on August 12, taken from the 83d Landwehr Regiment and the 36th Reserve Infantry Regiment, taken in haste from the Argonne; at the end of August it received conscripts of the 1917 class who had only been called up in May, many of whom came from depots in Baden.
Champagne.
3. At the beginning of September, the 21st Reserve Division came back into its own sector of Ville sur Tourbe. A short time afterwards it gave the 81st Reserve Infantry Regiment to the 222d Division a new formation.
4. In the middle of October it was sent to rest in the Rethel area.
Verdun.
5. On August 26 and 27 it was concentrated in the vicinity of Senon-Foameix. It occupied the sector of Hardaumont until December 7. After a few days’ rest it was brought back into line at Verdun (Bezonvaux, on Dec. 16).
1917.
1. The division left the Verdun front on January 11, 1917, very much exhausted.
Lorraine.
2. On February 24, 1917, it took over the sector Letricourt-Moncel in Lorraine.