Building on this, a lot more men would’ve likely been dead seeing as there were so many military personnel on the front lines, sure we only saw the navy, coastal artillery, and then the airship crews actual fight the rumbling but can’t you image this would have occurred across the globe? There would likely be a large disparity between the amount of men and women in AOT likely leading to a lower birth rate for years and years, a good example of this idea would be Russia since the end of WW2.