This comprehensive dictionary of one of the world's greatest conflicts contains over 1,200 entries, combining facts, narrative and analysis, and covers all aspects of history's first global conflict such as:

- Actions from Achi Baba to the Zeebrugge raid, from the Falkland Islands to the Masurian Lakes.

- Campaigns from the Arab Revolt to Verdun, from East Africa to East Prussia.

- Theatres of war from the Baltic to the Balkans, from Africa to the Arctic.

- Fighters and commanders from Abdullah ibn Hussein to Sergeant York via Pershing, Pilsudski and Petain.

- Forces from the Romanian Navy to the Royal Flying Corps, from the South Persia Rifles to the Serbian Army.

- Weapons and equipment from balloons and bayonets to Battleships and Big Bertha.

- Tactics and strategies from submarine warfare to sniping, from the Schlieffen Plan to strategic bombing, breakthrough and blockade

- Politics and diplomacy from Willhelm II to Woodrow Wilson, from the July Crisis to Versailles

- Home Fronts from the Armenian Massacres to the Amiens

- Dispatch, from Albania to Australia, from women to war socialism.