What are some similarities between the modern vs vietnam/wwii eras?

Hello
this is critical analysis paper which is about two books the names of the books are
-No true glory by Bing West
– Dark yo by Edward Murphy
This are the questions to answer in the essay
What are the motivations for those who are fighting? Why are they fighting at all? What are some of the major problems that occur in the books? Why do those problems occur? What makes the Soldiers successful/unsuccessful? How do these Soldiers overcome adversity? What role do NCO’s/Officers play in the success (or lack thereof) of the missions? What are some key differences between the modern examples of Soldiering vs the Vietnam/WWII era? What are some similarities between the modern vs Vietnam/WWII eras? What could Modern Soldiers learn from the older generations and what could the older generations learn from the Modern Soldiers?
If you could add citation from the books