d) The Diplomatic Resolution of Problems
Nations sometimes resort to international arbitration and mediation when faced with a specific question or point of contention in need of resolution. For most of history, there were no official or formal procedures for such proceedings.
They were generally accepted to abide by general principles and protocols related to international law and justice.
Sometimes these took the form of formal arbitrations and mediations. In such cases a commission of diplomats might be convened to hear all sides of an issue, and to come some sort of ruling based on international law.
In the modern era, much of this work is often carried out by the International Court of Justice at the Hague, or other formal commissions, agencies and tribunals, working under the United Nations. Below are some examples.
Hay-Herbert Treaty Enacted after the United States and Britain submitted a dispute to international mediation about the US-Canadian border, etc.
Conference resolutions were sought through the convening of international conferences. In such cases, there are fewer ground rules, and fewer formal applications of international law. However, participants are expected to guide themselves through principles of international fairness, logic, and protocol.
The nations convene official negotiation processes to settle an issue or dispute between several nations which are parties to a dispute. These are similar to the conferences mentioned above, as there are technically no established rules or procedures. However, there are general principles and precedents which help define a course for such proceedings.