Total available manpower fit for military service by nation.
Victory in war ultimately comes down to available manpower that is Fit for Military Service, a crucial factor in the GFP ranking as it represents the portion of a given population that is (theoretically) available to assist in a war effort. This assumes able-bodied persons suitable for the fighting and material production involved in waging a long-running campaign. Manpower Fit-for-Military-Service is used by the GFP final ranking to further refine a nation's overall military strength. Those nations with inherently large overall populations will, rather appropriately, be capable of offering more personnel that are fit for military service.
Data presented on this list is through 2019. Estimates are made when official data is not available.
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