 Complete the following phrase:  The German Army had begun 1916 equally well provided for in artillery and ammunition, massing field and heavy artillery shells for the beginning of the Battle of Verdun. Four million rounds were fired in the first fortnight and the 5th Army needed about trains a day to replace consumption. The Battle of the Somme further reduced the German reserve of ammunition and when the infantry was forced out of the front position, the need for defensive barrages, to compensate for the lack of obstacles, increased. Before the war and the Allied naval 