You are completely right. Disease has been the major killer in most military campaigns of history. The original post stated that 400,000 soldiers died "mostly f

You are completely right. Disease has been the major killer in most military campaigns of history. The original post stated that 400,000 soldiers died "mostly from starvation and exposure", which isn't correct. However, loosing over a third of an army to disease in 52 days, before any major battle solely to disease (Allen, B. M., https://apps.dtic.mil/sti/pdfs/ADA398046.pdf https://apps.dtic.mil/sti/pdfs/ADA398046.pdf), is unusually high. Starvation became a major problem later as supply chains broke down, and exposure became a major problem on the retreat. Though the retreat from Moscow included only about 100,000 people.