The conflict in Yugoslavia is like the canary in the coal mine. It is a flash point for trouble and has always been that way. The Crimean War of the latter part of the nineteenth century was begun when Russia invaded areas that were held by the Turks. Now it is once again invading and provoking war in the same region. In recent months strengthening of ties between its government and China, which is emerging as a strong force in the Pacific region, is making many nervous.