Baron Max Aitken Beaverbrook, Canada in Flanders, Volume II
“ As a matter of fact, the development of trench warfare and the reign of the machine-gun was so fatal a blow to German prospects that it is improbable that they would have declared war at all if they had thought it anything more than a bare possibility. To them it was a matter of life and death to keep the armies on the move—life if they could crush the French and British armies in the field and then turn back on Russia; death if they were condemned to a static defence while the invincible resources of the Allies in men and money accumulated slowly on either front. ”
