"I think to be shot in a mountain valley somewhere or other is altogether less glorious than crashing an airliner into a skyscraper"

In this quote, military historian John Keegan reveals an intriguing comparison in between 2 different kinds of death in dispute or crisis circumstances, both of which bring unique undertones about heroism, intent, and acknowledgment. Keegan, known for his insights into the nature of warfare, draws a juxtaposition between the image of being "shot in a mountain valley" and "crashing an airliner into a skyscraper."

The expression "shot in a mountain valley" suggests a singular and possibly confidential death, evoking scenarios such as guerrilla warfare, ambushes, or battles in remote locations. This type of death may do not have the spectacle connected with grander, more public acts of violence. It indicates a quiet, possibly unheralded end, without considerable public acknowledgment or historical impact-- a fate not uncommon for soldiers or insurgents in remote disputes who perish without fanfare.

On the other hand, "crashing an airliner into a high-rise building" stimulates images of significant, large-scale events with instant global attention, such as terrorist attacks exhibited by the 9/11 attacks. This act is marked by its intention to create optimum visibility and shock, affecting not just the instant victims but also resonating symbolically and politically on a worldwide scale. The reference recommends an intentional, high-profile method to achieving a kind of prestige or infamy, ensuring that the act is remembered and evaluated far beyond the moment of its occurrence.

Keegan's comparison underscores a consideration on the nature of splendor and remembrance in death. It questions how society views acts of violence depending upon their context and scale, along with the motivations behind them. The quote triggers reflection on whether glory is inherently tied to the magnitude of an act and its visibility, or if it must be determined by other values such as nerve, intent, or the effects of one's actions. Ultimately, Keegan seems to challenge the reader to think about the complexities of honor and tradition in the stories of conflict.