Campaign in Mexico

Good afternoon! I’m contacting you in regards to a book report that’s a minimum of 750 words. It’s a summary of a historical book that I will link below. 
It needs to answer these 3 questions:
1. What surprised you about the book? 
 2. What does it say about race in the 19th century? 
 3. What does it say about American imperialism? 
It would be in Chicago formatting and has footnotes.I greatly appreciate it! 

https://babel.hathitrust.org/cgi/pt?id=nyp.33433112152958&view=1up&seq=9&skin=2021