War declaration Cutscenes for All Leaders from Civilization 6.
There are two different Reaction, and it is hell of a job to trigger Gandhi's :D
Did Gandhi EVER Declared War on You? (Civ VI) .

Leaders: Victoria, Gandhi, Philip II., Cleopatra, Frederick, Catherine de Medici, Pedro II., Gorgo, Qin Shi Huang, Teddy Roosevelt, Saladin, Montezuma, Gilgamesh, Mvemba a Nzinga, Tomyris, Trajan, Pericles, Peter, Harald Hardrada, Hojo Tokimune.