#4 What is a Multinational Operation? – Dr Regeena Kingsley Multinational Operations (MNOs) Multinational operations (MNOs) have become an overriding feature of combat during the twentieth and twenty-first centuries. Operations conducted by an allied force drawn from several nations have taken place in multiple theatres around the world during this period. During the twentieth century, for instance, MNOs took place in France during World War I; in Northern Russia at the close of the war in 1918; in both the European and the Asia-Pacific theatres of war during World War II; in Palestine, Korea, the Dominican Republic and