B1 to give up the struggle at the same time that he does. And if B2 is
thus harassed to the breaking-point, the whole alliance, A plus B,
will lose the men and materials and wealth represented by B2, and
_may_ lose the whole shaded area, B, leaving A to support singly for
the future the combined attacks of M and N along the lines of attack,
XX and YY.

Now, that diagram accurately represents the political embarrassment in
strategy of the German-Austro-Hungarian alliance. B1 is Austria and
Bohemia; B2 is Hungary; A is the German Empire; M is the Russians; N
is the Allies in the West. With a geographical arrangement such as
that of the Germanic alliance, a comparatively small proportion of the
Russian forces detached to harry the Hungarian plain can make the
Hungarians, who have little moral attachment to the Austrians and none
whatever to the Germans, abandon the struggle to save themselves;
while it is possible that this outlier, being thus detached, will drag
with it its fellow-half, the Austrian half of the dual monarchy, cause
the Government of the dual monarchy to sue for peace, and leave the
German Empire isolated to support the undivided attention of the
Russians from the East and of the French from the West.

It is clear that if a strong Power, A, allied with and dependent for
large resources in men upon a weaker Power, B, is attacked from the
left and from the right, the ideal arrangement for the strong Power,
A, would be something in the nature of the following diagram (Sketch
9), where the weaker Power stands protected in the territory of the
stronger Power, and where of the two halves of the weaker Power, B2,
the less certain half, is especially protected from attack.

[Illustration: Sketch 9.]