World War I
An army corps is a large military formation that typically consists of two or more divisions and support units, capable of conducting significant operations on the battlefield. This structure was crucial during the mobilization and initial military strategies of the First World War, as it allowed for more effective organization and deployment of troops across various fronts. The army corps played a vital role in coordinating large-scale military actions, which was essential in responding to the rapidly changing dynamics of warfare during this period.
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