Diagrammatic view of the western theater of war, showing the principal plateaus and plains, mountains and lowlands, cliff scarps and river trenches which have influenced military operations. The underground rock structure is shown in the front edge of the block.

COLLECTED MATERIALS FOR THE STUDY OF THE WAR.

Diagrammatic view of the eastern theater of war, showing the Carpathian Mountains and their chief passes, the plain of Poland, the hill and lake country of East Prussia, the river trenches and marshes, and other features of the terrain which have influenced military operations in the east.

Map showing barriers and trenches of the Balkan Peninsula.

Abbreviations. (1) In northern Serbia, etc.: Lo, for Losnitza; Ma, for Malyen Ridge; Mi, for Mitrovitza (on the Save); O, for Orsova; Ob, for Obrenovatz; S, for Shabatz; (2) Along the Morava-Vardar trench; D, for Demir Kapu gorge; Ku, for Kumanovo; Se, for Semendria; U, for Uzhitze; Va, for Valyevo; Vi, for Vishegrad; Z, for Zaietchar. L, for Leukovatz; Ve, for Veles; Vr, for Vranye. (3) Elsewhere: Du, for Durazzo (on the Adriatic); I, for Ipek (42° N. and 20° E.); K, for Katchanik (42° N. and 21° E.). From Johnson's Topography and Strategy in the War, p. 144.

The Italian theater of war, showing the principal mountain and plateau barriers, river trenches and marshes, affecting the Italian campaigns. From Johnson's Topography and Strategy in the War, p. 121.