The middle of March found Germany at the height of her man power. Never before since the outbreak of war had the opportunity been presented for the concentration on the western front of practically her entire effective strength in both men and guns. For this, of course, Russia was responsible. The divisions which were holding the Russian lines had been carefully picked over, and from men thus selected new divisions were formed and old ones filled up. All were sent to France as rapidly as possible, the movement occupying the time from September, 1917, to March of this year. Similarly, all available artillery was concentrated in the west, the eastern front being practically denuded. Germany then was in immediate danger of being diverted by activities of the Allies in other fields. [Sidenote: America could not furnish numbers in 1917.] The Allies on the other hand were by no means at their full strength. America, who stepped into the war just in time to take Russia's place, still remained impotent, unable to place in Europe numbers in any way commensurate with the situation. But America was gathering impetus as she went. And while she was a negligible force in 1917--except in the matters of food and money--and would probably be a negligible force in 1918 subject to the same exception, in 1919 she was almost certain to turn the tide strongly against the Central Powers. Even in 1918 there could be expected a steady though small stream of men across the ocean, who being fresh, eager, and unwearied, might cause trouble. Germany then had the one chance to win, and that chance demanded that she strike with all her power before America reached the field. To delay meant not a drawn game but certain defeat. For if Germany is ever confronted in Europe with the full strength of America in men and in the machinery of war, she will be crushed. [Sidenote: Germany must strike before America reaches the field.] [Sidenote: The Russian situation is disquieting.] Finally, the situation in Russia boded ill for Germany. Great rejoicing has taken place in Berlin and in Vienna over peace with Russia. But it is a peace which has not altered Germany's inability to keep faith with any Power. Her persistent worship of materialism and force has created a situation in Russia not at all to Germany's liking. Once the Russian border was absolutely undefended and the way to Petrograd and Moscow wide open, Germany could not resist the temptation to march on in continued aggression, regardless of treaty or promises or peace or morality. And Russia has furnished strong evidence that she is not at all complacent under such aggression. [Sidenote: A new Russian national army is formed.] [Sidenote: Danger of guerilla warfare.]