John GrehanJOHN GREHAN has written, edited or contributed to more than 300 books and magazine articles covering a wide span of military history from the Iron Age to the recent conflict in Afghanistan. John has also appeared on local and national radio and televsion to advise on military history topics. He was employed as the Assistant Editor of Britain at War Magazine from its inception until 2014. John now devotes his time to writing and editing books. Read More Read Less