[Jackknife]

Napoleon was the man to put mass infantries on the battlefield. Thjis kind of warfare led to the huget slaughters of 18th and 20th century wars.

This is specifically why there were so many casualties during the War Between the States. The generals at that time studied, and used, Napoleonic battle strategies. The problem was, the firearms were revolutionized at the same time, and produced terrible carnage at close range.

[Extremely Extreme Extremist]

The days of mass armies fighting over open land are over, IMO.