Forgive me if this one has been mentioned already, but H.G. Wells' War Of The Worlds is a perennial favorite of mine. At first blush, both the story and my esteem for it may seem rather pedestrian, but I developed a whole new appreciation for the work when, as an adult, I revisited it in the edition that includes an afterward by Isaac Asimov. In it, Asimov discusses the work in the context in which it was originally conceived and written: an allegory of late 19th century British imperialism. As I recall, Asimov cites additional examples of ill-conceived conquest, such as the French foray into Algeria, and the Soviet debacle in Afghanistan. Such unfortunate behavior continues today, by myriad players in numerous theaters of war on countless pretexts, with predictably identical results. Perhaps the Asimov edition of WOTW should be required reading for anyone who aspires to a leadership capacity, with special emphasis on the reality that might does not necessarily make right, and that there exists no military antidote to elementally social ills.
TC