In March, the Germans launched the Spring Offensive, against the Third Army and the Fifth Army on the Somme, which were understrength due to the small numbers of replacements being sent from Britain.
The Germans launched the Spring Offensive on the Somme. This was in March. This was against the Third Army. This was against the Fifth Army. The Somme were understrength due to the small numbers of replacements. These replacements were being sent from Britain.