Emphasis toward massed firepower and large armies supported by rail logistics.
Increased emphasis on a holding defense and flanking or wide turning maneuvers into adversary rear to gain a decision.
Continued use of frontal assaults by large stereotyped infantry formations (e.g., regiments, battalions), supported by artillery barrages, against regions of strong resistance.
Result
Huge armies, and massed firepower and other vast needs supported through a narrow fixed logistics network, together with tactical assaults by large stereotyped formations, suppressed ambiguity, deception, and mobility hence surprise of any operation.