Vanguard series ;

Steven Joseph Zaloga (born February 1, 1952) is an American author and defense consultant. He received a bachelor's degree cum laude at Union College and a master's degree at Columbia University, both in history. He has published many books dealing with modern military technology, and especially Soviet and CIS tanks and armoured warfare. He is a senior analyst at the Teal Group. Source: [Steven J. Zaloga]( on Wikipedia.