It's a good book, better than some out there, but you need to read it in conjunction with some other books to get a full perspective. Also, some of Boot's later chapters are less informative and useful than the earlier sections. He tends to get bogged down in "blood and thunder" battle narratives and lose sight of the larger picture on occasions, though. The best section deal with American involvement in Central America and (interestingly enough) Russia after World War I.