A non-aggression pact or neutrality pact is a treaty between two or more states/countries that includes a promise by the signatories not to engage in military action against each other. Such treaties may be described by other names, such as a treaty of friendship or non-belligerency, etc. Leeds, Ritter, Mitchell, & Long (2002) distinguish between a non-aggression pact and a neutrality pact. They posit that a non-aggression pact includes the promise not to attack the other pact signatories, whereas a neutrality pact includes a promise to avoid support of any entity that acts against the interests of any of the pact signatories. The most readily recognized example of the aforementioned entity is another country, nation-state, or sovereign organization that represents a negative consequence towards the advantages held by one or more of the signatory parties.

History

In the 19th century, neutrality pacts have historically been used to give permission for one signatory of the pact to attack or attempt to negatively influence an entity not protected by the neutrality pact. The participants of the neutrality pact agree not to attempt to counteract an act of aggression waged by a pact signatory towards an entity not protected under the terms of the pact. Possible motivations for such acts by one or more of the pacts' signatories include a desire to take, or expand, control of economic resources, militarily important locations, etc.

The Molotov–Ribbentrop Pact (German copy)

The 1939 Molotov–Ribbentrop Pact between the Soviet Union and Nazi Germany is perhaps the best-known example of a non-aggression pact. The Pact lasted until the 1941 German invasion of the Soviet Union in Operation Barbarossa. However, such pacts may be a device for neutralising a potential military threat, enabling at least one of the signatories to free up its military resources for other purposes. For example, the Molotov–Ribbentrop Pact freed German resources from the Russian front. On the other hand, the Soviet–Japanese Neutrality Pact, signed on April 13, 1941, removed the threat from Japan in the east enabling the Soviets to move large forces from Siberia to the fight against the Germans, which had a direct bearing on the Battle of Moscow.

The Alliance Treaty Obligations and Provisions (ATOP) dataset records 185 agreements that are solely non-aggression pacts between 1815 and 2018. According to this data, 29 such pacts were recorded in the interwar period with spikes in occurrences in 1960, 1970, 1979, and especially the early 1990s where a number of Eastern European states signed pacts following the fall of the Soviet Union.

States with a history of rivalry tend to sign non-aggression pacts in order to prevent future conflict with one another. The pacts often facilitate information exchange which reduce uncertainty that might lead to conflict. Additionally, the pact signals to third party nations that the rivalry has reduced and that peaceful relations is desired. It has been found that major powers are more likely to start military conflicts against their partners in non-aggression pacts than against states that do not have any sort of alliance with them.

List of non-aggression pacts

List of non-aggression pacts
SignatoriesTreatyDate signed
New Kingdom of Egypt Hittite EmpireEgyptian–Hittite peace treatyNovember 10, 1259 BCE
Delian League Achaemenid EmpirePeace of Calliasc. 449 BCE
Byzantine Empire Republic of VeniceByzantine–Venetian Treaty of 1268April 4, 1268
Byzantine Empire Republic of VeniceByzantine–Venetian Treaty of 1277March 19, 1277
Byzantine Empire Republic of VeniceByzantine–Venetian Treaty of 1285June 15, 1285
Byzantine Empire Republic of VeniceByzantine–Venetian Treaty of 1390June 2, 1390
Kingdom of England Kingdom of France Holy Roman Empire Papal States Habsburg SpainTreaty of LondonOctober 3, 1518
Soviet Union Weimar RepublicGerman–Soviet Neutrality and Nonaggression PactApril 24, 1926
Republic of Lithuania Soviet UnionSoviet–Lithuanian Non-Aggression PactSeptember 28, 1926
Kingdom of Romania Second Hellenic RepublicGreek–Romanian Non-Aggression and Arbitration PactMarch 21, 1928
Kingdom of Afghanistan Soviet UnionSoviet–Afghan Non-Aggression PactJune 24, 1931
Republic of Finland Soviet UnionSoviet–Finnish Non-Aggression PactJanuary 21, 1932
Republic of Latvia Soviet UnionSoviet–Latvian Non-Aggression PactFebruary 5, 1932
Republic of Estonia Soviet UnionSoviet–Estonian Non-Aggression PactMay 4, 1932
Second Polish Republic Soviet UnionSoviet–Polish Non-Aggression PactJuly 25, 1932
French Third Republic Soviet UnionSoviet–French Non-Aggression PactNovember 29, 1932
Kingdom of Italy Soviet UnionItalo-Soviet PactSeptember 2, 1933
Kingdom of Romania Republic of TurkeyRomanian–Turkish Non-Aggression PactOctober 17, 1933
Kingdom of Yugoslavia Republic of TurkeyTurkish–Yugoslav Non-Aggression PactNovember 27, 1933
Nazi Germany Second Polish RepublicGerman–Polish Declaration of Non-AggressionJanuary 26, 1934
French Third Republic Soviet UnionFranco-Soviet Treaty of Mutual AssistanceMay 2, 1935
Empire of Japan Nazi GermanyAnti-Comintern PactNovember 25, 1936
Republic of China Soviet UnionSino-Soviet Non-Aggression PactAugust 21, 1937
Imperial State of Iran Kingdom of Afghanistan Kingdom of Iraq Republic of TurkeyTreaty of SaadabadJune 25, 1938
First Czechoslovak Republic Kingdom of Hungary Kingdom of Romania Kingdom of YugoslaviaHungarian–Little Entente agreementAugust 22, 1938
French Third Republic Nazi GermanyFranco–German Non-Aggression PactDecember 6, 1938
Estado Novo (Portugal) Spanish StateIberian PactMarch 17, 1939
Kingdom of Denmark Nazi GermanyGerman–Danish Non-Aggression Pact[de]May 31, 1939
Nazi Germany Republic of EstoniaGerman–Estonian Non-Aggression PactJune 7, 1939
Nazi Germany Republic of LatviaGerman–Latvian Non-Aggression PactJune 7, 1939
Nazi Germany Soviet UnionMolotov–Ribbentrop Pact23 August 1939
Thailand United KingdomBritish–Thai Non-Aggression PactJune 12, 1940
French Third Republic ThailandFranco-Thai Non-Aggression PactJune 12, 1940
Kingdom of Hungary Kingdom of YugoslaviaHungarian–Yugoslav Non-Aggression PactDecember 12, 1940
Kingdom of Yugoslavia Soviet UnionSoviet–Yugoslav Non-Aggression Pact[ru]April 6, 1941
Empire of Japan Soviet UnionSoviet–Japanese Neutrality PactApril 13, 1941
Nazi Germany Republic of TurkeyGerman–Turkish Treaty of FriendshipJune 18, 1941
People's Republic of Angola Zaire ZambiaNon-Aggression Pact of 1979October 14, 1979
Republic of South Africa People's Republic of MozambiqueNkomati AccordMarch 13, 1984

List of proposed non-aggression pacts

Other usage

The term has colloquial usage outside the field of international relations. In the context of association football, the term can imply a deliberate lack of aggression between two teams, such as at the Disgrace of Gijón, which, in Germany, is known as the Nichtangriffspakt von Gijón (lit. "Non-aggression pact of Gijón"). A non-aggression pact can also be a formal agreement or gentlemen's agreement limiting transfers for players between two or more clubs.

See also