The book “The Great Patriotic War” of the “Encyclopedia for Children” series is dedicated to the 65th anniversary of the Victory of our people over fascism. It is addressed to the widest audience - from schoolchildren and teachers to scientists researching the events of the Second World War, and readers simply interested in history. For the first time in Russia, a publication has been published that aims to tell about the main stages and operations of the Great Patriotic War from the point of view of professionals in various fields: military, demographers, specialists in losses and technical equipment of the parties. The reader will learn about the different points of view currently being expressed on key events that occurred more than 60 years ago. The book contains a lot of supporting material: maps, diagrams, and over 1000 color and black and white illustrations.