Allied leaders came to Yalta because they knew that an Allies` victory in Europe was almost inevitable, but they were less convinced that the Pacific War was coming to an end. Recognizing that a victory over Japan might require a long-term struggle, the United States and Britain saw a great strategic advantage for Soviet participation in peaceful theatre. At Yalta, Roosevelt and Churchill discussed with Stalin the conditions under which the Soviet Union would go to war with Japan, and all three agreed that the Soviets should have a sphere of influence in Manchuria in exchange for a potentially decisive Soviet participation in the Pacific theatre after Japan`s surrender. These include the southern part of Sachalin, a lease in Port Arthur (now Thehukou), part of the manchury and Kuril Islands. This agreement was the main concrete achievement of the Yalta conference. In a telegram sent to Roosevelt on 11 October, Churchill wrote: “Stalin and I should try to have a common spirit across the Balkans in order to prevent a civil war from breaking out in several countries, so probably you and I sympathize with each other and with the United States of the U.J., that is, Stalin. I will keep you informed of all this and nothing will be settled, other than the provisional agreements between Britain and Russia, subject to further discussions and a merger agreement with you. On that basis, you will certainly not object to us trying to have a full meeting of minds with the Russians.  On the same day, Churchill sent a letter to Stalin saying that Britain had special ties to King Peter II and King George II of Greece, which made Britain a matter of honour to return to his throne, even though he suggested that the peoples of the Balkans had the right to choose any form of political system. they loved, except fascism.  Churchill stated that percentages are merely “a method that allows us to see in our thoughts how close we are together” and to find a way to get closer.  Upon his return to London on 12 October, Churchill declared that the agreement was “only an interim guide for the immediate war period.