" I conceive myself entitled to repeat, now that the results are known, the opinions which I put on record before all these battles were fought. I wrote to the Prime Minister on December 29, 1914, as follows: ‘I think it quite possible that neither side will have the strength to penetrate the other’s lines in the Western theatre… Without attempting to take a final view, my impression is that the position of both armies is not likely to undergo any decisive change.’ And in June, 1915: ‘It is a fair general conclusion that the deadlock in the West will continue for some time and the side which risks most to pierce the lines of the other will put itself at a disadvantage. "

― Winston S. Churchill , The World Crisis, Vol. 3 Part 1 and Part 2 (Winston Churchill's World Crisis Collection)