Pinheiro explores in detail the relationship between civil authorities, particularly President James K. Polk, and the military during the Mexican War….Pinheiro argues that Polk's leadership style, ability to overcome his partisan leanings when necessary, and management of Congress and the War Department allowed him to keep his cabinet in check and respond to critics, thus enabling him to achieve his aim of annexing California. This is not a book for the uninitiated, as Pinheiro assumes familiarity with the events of the Mexican War, but students, period and civil-military relations specialists, and readers with a background in these areas will gain a deeper understanding of the course of the war. A bonus is a selection of documents and excerpts that bear on the issues raised in the text. Recommended for academic and larger public libraries.