The combat morale of the 12th Reserve Division may, however, have been restored during its long stay in the relatively quiet sector of St. Quentin (September to November, 1917).
1918.
Flanders.
1. On February 4 the division relieved the 12th Reserve Division in the Moorslede sector which it held until February 14.
Lens.
2. It was relieved by the 31st Division and moved south to relieve the 17th Division on night of February 17–18. It held this front until about April 10, when it was relieved by the 9th Reserve Division.
Battle of the Lys.
3. The division reinforced the battle front at Neuve Eglise on April 13 and fought until about April 25, suffering heavy losses. One company of the 51st Reserve Regiment was reduced to 9 men.
4. Upon relief, the division returned to its former sector near Lens, where it was identified near Avion on April 27. It remained here until June 14, when it moved north and entered the line northeast of Hinges on June 17–18. About August 6, the division was relieved by the 1st Guard Reserve Division.