• 1900s in international relations (10 C, 2 P)
• 1910s in international relations (12 C, 3 P)
• 1920s in international relations (12 C)
• 1930s in international relations (11 C, 1 P)
• 1940s in international relations (12 C, 1 P)
• 1950s in international relations (11 C, 1 P)
• 1960s in international relations (11 C, 6 P)
• 1970s in international relations (11 C, 4 P)
• 1980s in international relations (12 C, 4 P)
• 1990s in international relations (14 C, 5 P)

B

• Baltic diplomatic missions (18 P)

C

• Cold War (23 C, 177 P)
• Foreign relations of Czechoslovakia (11 C, 13 P)

D

• 20th-century diplomatic conferences (6 C, 236 P)
• Diplomatic crises of the 20th century (4 C, 26 P)
• 20th-century diplomats (14 C, 185 P)

G

• Foreign relations of East Germany (10 C, 10 P)
• Foreign relations of West Germany (3 C, 1 P)

H

• History of international relations (1918–1939) (15 C, 5 P)

I

• Foreign relations during the Iran–Iraq War (2 C, 20 P)

L

• Lists of sovereign states in the 20th century (10 P)

M

• 20th-century military alliances (11 C, 75 P)

N

• Non-Aligned Movement (4 C, 30 P)

R

• Foreign relations of Rhodesia (7 C, 12 P)
• Foreign relations of the Russian Empire (10 C, 14 P)

S

• Foreign relations of the Soviet Union (36 C, 124 P)

T

• 20th-century treaties (146 C, 3 P)

A

• List of international presidential trips made by António José de Almeida
• Anwar Sadat's visit to Jerusalem
• Appeasement
• List of international trips made by Yasser Arafat

B

• List of international prime ministerial trips made by Tony Blair

C

• Central Powers
• List of Commonwealth visits made by Elizabeth II

D

• De-satellization of the Socialist Republic of Romania
• List of international prime ministerial trips made by Morarji Desai
• Diplomatic Archives of Serbia
• Diplomatic history of World War I
• Dissolution of the Ottoman Empire

E

• External association

F

• Foreign relations of the Axis powers

G

• List of international prime ministerial trips made by Rajiv Gandhi

I

• Inter-Allied Rhineland High Commission
• List of international presidential trips made by George H. W. Bush
• List of international presidential trips made by Jimmy Carter
• International relations (1919–1939)
• List of international trips made by Mikhail Gorbachev

J

• Shimoda Conference

L

• Linkage (policy)
• List of international presidential trips made by Gamal Abdel Nasser
• List of international presidential trips made by Hafez al-Assad
• List of international presidential trips made by Slobodan Milošević
• List of international trips made by Jiang Zemin
• List of international trips made by Josip Broz Tito
• List of national border changes (1914–present)
• List of international presidential trips made by Francisco Craveiro Lopes

M

• List of international presidential trips made by Bernardino Machado

N

• List of national border changes (1815–1914)
• List of international prime ministerial trips made by Benjamin Netanyahu
• Non-Aligned Movement

O

• Ottoman Empire in World War I

P

• Pax Britannica
• Pax Syriana

R

• List of international prime ministerial trips made by P. V. Narasimha Rao
• Reagan Doctrine
• Occupation of the Rhineland
• Foreign policy of the Russian Empire
• Russian entry into World War I

S

• List of international trips made by Saddam Hussein
• Scramble for Africa
• List of international prime ministerial trips made by Lal Bahadur Shastri
• List of international presidential trips made by Mário Soares
• List of state visits made by Elizabeth II

U

• United Nations trust territories

V

• List of international prime ministerial trips made by Atal Bihari Vajpayee

W

• Weak countries have no diplomacy

Y

• Yugoslavia and the Non-Aligned Movement