Roshwald, Aviel: Ethnic nationalism and the fall of empires. Central Europe, Russia and the Middle East, 1914-1923.
Rothenberg, Gunther E.: The army of Francis Joseph.
Rothwell, Victor: British war aims and peace diplomacy, 1914-1918.
Schanafelt, Gary W.: The secret enemy. Austria-Hungary and the German Alliance, 1914-1918.
Schindler, John R.: Isonzo. The forgotten sacrifice.
Sheffield, Gary: Forgotten victory. The First World War. Myths and realities.
Sondhaus, Lawrence: Franz Conrad von Hötzendorf. Architect of apocalypse.
Sondhaus, Lawrence: World War One. The global revolution.
Steiner, Zara S.: Britain and the Origins of the First World War.
Stevenson, David: 1914-1918. The history of the First World War.
Stevenson, David: Cataclysm. The First World War as political tragedy.
Stevenson, David: French war aims against Germany, 1914-1919.
Stevenson, David: The First World War and international politics.
Strachan, Hew: The outbreak of the First World War.
Sukiennicki, Wiktor: East Central Europe during World War I. From foreign domination to national independence.
Taylor, A.J.P.: The First World War. An illustrated history.
Terraine, John: The First World War.
Thomson, George Malcolm: The twelve Days 24 July to 4 August 1914.
Treadway, John D.: The falcon and the eagle. Montenegro and Austria-Hungary.
Tuchman, Barbara W.: The Guns of August.