V.K. Triandafillov 
Nature of the Operations of Modern Armies [PDF ebook] 

V K Triandafillov was an outstanding young commander who shaped the military theory and doctrine of the Red Army as it came to grips with the problem of future war. A conscript soldier who rose through the ranks to become an officer in the Tsarist Army, he saw combat in both the First World War and the Russian Civil War. A student of some of the finest military specialists teaching the first generation of young Red commanders, he sought to link theory and practice by using past experience to comprehend future combat.