Question: What was named The Trusteeship of the Powerful by the body in which the US and country that succeeded Russia after the Russian Revolution became important members?

The Soviet Union suffered greatly in the war, losing around 27 million people. During the war, the Soviet Union together with the United States, the United Kingdom and China were considered as the Big Four of Allied powers in World War II and later became the Four Policemen which was the foundation of the United Nations Security Council. Approximately 2.8 million Soviet POWs died of starvation, mistreatment, or executions in just eight months of 1941 -- 42. It emerged as a superpower in the post-war period. Once denied diplomatic recognition by the Western world, the Soviet Union had official relations with practically every nation by the late 1940s. A member of the United Nations at its foundation in 1945, the Soviet Union became one of the five permanent members of the United Nations Security Council, which gave it the right to veto any of its resolutions. <SEP> the body that would become the senate was established in 1809, when tsar alexander i of russia summoned the diet of porvoo and directed the diet to draw up regulations for a government council. in 1816, alexander renamed this body the senate to demonstrate that it was equal to rather than inferior to its russian equivalent.the senate was headed by the governor-general of finland. the members of the senate had to be finnish citizens. the senate was divided into the economic division and the judicial division. in 1822 both divisions were given a finnish vice-chairman. from 1858 and onwards the members of the senate were formally known as senators. after the february revolution in russia the vice chairman of the economic division became the chairman of the senate. due to the civil war in 1918 the senate was relocated to the town of vaasa from january 29 to may 3. <SEP> after the russian revolution and the russian civil war the ships of the fleet became dispersed over various countries, and soviet russia made efforts via international courts to have them returned. dobroflot was restored in the soviet union in 1922 and included into the sovtorgflot ("soviet commercial fleet") in 1925. <SEP> On December 7, 1941, Japan attacked the United States at Pearl Harbor, bringing it too into the war on the Allied side. China also joined the Allies, as eventually did most of the rest of the world. China was in turmoil at the time, and attacked Japanese armies through guerilla-type warfare. The United Kingdom, the United States, the Soviet Union and China were referred as a "trusteeship of the powerful" during the World War II  and were recognized as the Allied "Big Four" in Declaration by United Nations These four countries were considered as the "Four Policemen" or "Four Sheriffs" of the Allies power and primary victors of World War II. By the beginning of 1942, the major combatants were aligned as follows: the British Commonwealth, the United States, and the Soviet Union were fighting Germany and Italy; and the British Commonwealth, China, and the United States were fighting Japan. From then through August 1945, battles raged across all of Europe, in the North Atlantic Ocean, across North Africa, throughout Southeast Asia, throughout China, across the Pacific Ocean and in the air over Japan. <SEP> The Russian Empire collapsed with the abdication of Emperor Nicholas II and the old regime was replaced by a provisional government during the first revolution of February 1917 (March in the Gregorian calendar; the older Julian calendar was in use in Russia at the time). Alongside it arose grassroots community assemblies (called 'soviets') which contended for authority. In the second revolution that October, the Provisional Government was toppled and all power was given to the soviets. The Russian Revolution was a pair of revolutions in Russia in 1917 which dismantled the Tsarist autocracy and led to the rise of the Soviet Union.