Best book giving an overview of the wars of history?

Encyclopedia of Warfare
Covers basically every battle ever, got it as a "Christmas gift" for myself at Costco

John Keegan (15 May 1934 – 2 August 2012) was an English military historian, lecturer, author and journalist. He wrote many published works on the nature of combat between prehistory and the 21st century, covering land, air, maritime, intelligence warfare and the psychology of battle.

Notable works
The Face of Battle
Soldiers: A History of Men in Battle
The Mask of Command
A History of Warfare

FoB or HoW