Instruct: Classify the given review into positive or negative sentiment.
Query: Half political history, half airpower history

I bought this book after reading some of the brilliant articles written by James Corum for the USAF official magazine. I rate this book with only two stars, because if one knows the history of various insurgencies of the past, can easily avoid reading half of the pages.Corum and Johnson did not go deep in details, so the book remains just a general historical overview of the phenomenon of airpower against insurgents, even forgetting some minor wars (Sri Lanka against Tamils, Russia against Chechens, Morocco against Saharawis and so on).Moreover, in the chapter dedicated to Colombia the two authors give an explicit negative political judgement on Clinton politics and overtly claim an American military intervention in the ongoing Colombian civil war: mixing politics with an academic work is not a good thing.