Question: The US and the country called Russia before the Russian Revolution became important members in a peace keeping organisation. When was Eritrea annexed by the largest troop contributor to that organisation?

<P0-S0> 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). <P0-S1> 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. <P0-S2> Alongside it arose grassroots community assemblies (called 'soviets') which contended for authority. <P0-S3> In the second revolution that October, the Provisional Government was toppled and all power was given to the soviets. <SEP> <P1-S0> The Soviet Union suffered greatly in the war, losing around 27 million people. <P1-S1> 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. <P1-S2> Approximately 2.8 million Soviet POWs died of starvation, mistreatment, or executions in just eight months of 1941 -- 42. <P1-S3> It emerged as a superpower in the post-war period. <P1-S4> Once denied diplomatic recognition by the Western world, the Soviet Union had official relations with practically every nation by the late 1940s. <P1-S5> 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> <P2-S0> armenia is member of collective security treaty organisation (csto) along with belarus, kazakhstan, kyrgyzstan, russia, tajikistan and uzbekistan. <P2-S1> it participates in nato's partnership for peace (pip) program and is in a nato organisation called euro-atlantic partnership council (eapc). <P2-S2> armenia has engaged in a peacekeeping mission in kosovo as part of non-nato kfor troops under greek command. <P2-S3> armenia also had 46 members of its military peacekeeping forces as a part of the coalition forces in iraq war until october 2008. <SEP> <P3-S0> In June 2013. <P3-S1> Pakistan contributed the highest number overall with 8,186 personnel, followed by India (7,878), Bangladesh (7,799), Ethiopia (6,502), Rwanda (4,686), Nigeria (4,684), Nepal (4,495), Jordan (3,374), Ghana (2,859), and Egypt (2,750). <P3-S2> As of 28 February 2015, 120 countries were contributing a total of 104,928 personnel in Peacekeeping Operations, with Bangladesh leading the tally (9446). <P3-S3> As of March 2008, in addition to military and police personnel, 5,187 international civilian personnel, 2,031 UN Volunteers and 12,036 local civilian personnel worked in UN peacekeeping missions. <P3-S4> As of 29 February 2016, 124 countries were contributing a total of 105,314 personnel in Peacekeeping Operations, with Ethiopia leading the tally (8,324), followed by India (7,695) and Bangladesh (7,525). <SEP> <P4-S0> in the 1950s, the ethiopian feudal administration under emperor haile selassie sought to annex eritrea and italian somaliland. <P4-S1> he laid claim to both territories in a letter to franklin d. roosevelt at the paris peace conference and at the first session of the united nations. <P4-S2> in the united nations, the debate over the fate of the former italian colonies continued. <P4-S3> the british and americans preferred to cede all of eritrea except the western province to the ethiopians as a reward for their support during world war ii. <P4-S4> the independence bloc of eritrean parties consistently requested from the un general assembly that a referendum be held immediately to settle the eritrean question of sovereignty. <SEP> <P5-S0> During the Middle Ages, the Eritrea region was known as Medri Bahri ("sea-land"). <P5-S1> The name Eritrea is derived from the ancient Greek name for Red Sea (Ἐρυθρὰ Θάλασσα Erythra Thalassa, based on the adjective ἐρυθρός erythros "red"). <P5-S2> It was first formally adopted in 1890, with the formation of Italian Eritrea (Colonia Eritrea). <P5-S3> The territory became the Eritrea Governorate within Italian East Africa in 1936. <P5-S4> Eritrea gained independence following the 1993 referendum, and the name of the new state was defined as State of Eritrea in the 1997 constitution. <P5-S5> Eritrea was annexed by Ethiopia in 1953 (nominally within a federation until 1962) and an Eritrean Liberation Front formed in 1960. <P5-S6> [citation needed]