World War Key

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Key Battles of World War One                    

Independently published

World War 2: The Key Events Of WWII              

Encyclopedia Britannica

Key Figures of World War II (Biographies of War) (English Edition)

Key Battles of World War II: Conflicts That Redefined World Borders And Shaped The Course of History (English Edition)

Hodder Education

The First World War with Imperial War Museums    

Encyclopedia Britannica

Key Figures of World War I (Biographies of War) (English Edition)

Usborne

The Second World War (Usborne History of Britain)

Hodder Children's Books

World War II                                    

Heinemann/Raintree

Key Battles of World War I                      

George Mann Books

The Key to Survival, Bomber Command in World War II