If you are a professor at a military college (West Point, RMC, Sandhurst):

Every text has been independently reviewed by military officers from the US, UK, France, and Spain to ensure authenticity. Inside the Teacher's Book

The Teacher's Book is specifically designed to support instructors who may not have a military background. It provides: Macmillan English Campaign - Course Information - Macmillan English

Searching for "campaign english for the military 3 teacher 39-s book pdf" on Google or Bing will surface several dangerous sites. Be aware of: