- World War, 1914-1918--Causes (6)
- Europe--Politics and government--1871-1918 (4)
- European war, 1914-1918--Causes (3)
- World War, 1914-1918--Diplomatic history (2)
- Austria--Military policy (1)
- Eastern question (Balkan) (1)
- European war, 1914-1918--Netherlands (1)
- Germany--Military policy (1)
- Strategy--Congresses (1)
- Triple Alliance, 1882 (1)
- World War, 1914-1918--Causes--Congresses (1)
- World War, 1914-1918--Historiography (1)