William Allen, a British scientist, politician, diplomat and traveler, in collaboration with the Russian military historian P. Muratov, created an impressive overview of the major military conflicts of the 19th and 20th centuries. in the Caucasus, which has always been of great strategic importance, being a natural border between Asia and Europe. The book describes in detail battles and battles, problems of supplying troops in hard-to-reach areas, as well as the alignment of political interests of the warring parties. This work contains a wealth of information and can serve as an extremely authoritative source for both military historians and simply lovers of Russian and world history.