Ancient/medieval warfare, mostly because the soldiers actually had to fight instead of just guiding cruise missiles and whatsnot.
Even if wars are not cool, different wars must have different levels of coolness. Right? So answer the question!
Oh I'd also like to say that chic on chic warfare is the koolest.
Mix of diplomatic, economic and psychological warfare. The kind won without even firing a shot.What's the coolest kind of warfare?
and rode tanks,