The term 'Triumph of Diplomacy' refers to a successful diplomatic agreement or PACT. A PACT is an agreement between two or more parties, usually in the form of a written contract. In this case, the PACT was a diplomatic agreement that resulted in a successful outcome. This could be a treaty between two countries, a resolution to a conflict, or any other type of diplomatic agreement. The term 'Triumph of Diplomacy' is used to describe the success of such an agreement.