Question: When was Eritrea annexed by the largest troop contributor to the peacekeeping mission of the organization that approved the Korean War armistice that officially declared a ceasefire?

full_context: Document 1: United Nations Population Fund: Contributions from governments and the private sector to UNFPA in 2014 exceeded $1 billion. The amount includes $477 million to the organization’s core resources and $529 million earmarked for specific programs and initiatives.
Document 2: Eritrea: Eritrea (/ˌɛrᵻˈtreɪ.ə/ or /ˌɛrᵻˈtriːə/;, officially the State of Eritrea, is a country in East Africa. With its capital at Asmara, it is bordered by Sudan in the west, Ethiopia in the south, and Djibouti in the southeast. The northeastern and eastern parts of Eritrea have an extensive coastline along the Red Sea. The nation has a total area of approximately 117,600 km2 (45,406 sq mi), and includes the Dahlak Archipelago and several of the Hanish Islands. Its name Eritrea is based on the Greek name for the Red Sea (Ἐρυθρὰ Θάλασσα Erythra Thalassa), which was first adopted for Italian Eritrea in 1890.
Document 3: United Nations Population Fund: In response, the EU decided to fill the gap left behind by the US under the Sandbaek report. According to its Annual Report for 2008, the UNFPA received its funding mainly from European Governments: Of the total income of M845.3 M, $118 was donated by the Netherlands, $67 M by Sweden, $62 M by Norway, $54 M by Denmark, $53 M by the UK, $52 M by Spain, $19 M by Luxembourg. The European Commission donated further $36 M. The most important non-European donor State was Japan ($36 M). The number of donors exceeded 180 in one year.
Document 4: List of members of the United Nations Security Council: As of July 2011, there are currently 193 members of the United Nations and five permanent members of the Security Council. The other ten seats are assigned amongst the remaining 188 members. As a result, many members have never been on the Security Council. The following list is a summary of all countries, currently 68 modern nations and three historical ones, that have never been a member of the United Nations Security Council. The three historical UN members listed are Tanganyika, Zanzibar, and the Federal Republic of Yugoslavia.
Document 5: Military Police of Rio de Janeiro State: Under the United Nations, in cooperation with the Brazilian Army, the Military Police of Rio de Janeiro State has served in Angola, Mozambique, East-Timor, Sudan, and Haiti.
Document 6: Korean War: In 1952, the United States elected a new president, and on 29 November 1952, the president - elect, Dwight D. Eisenhower, went to Korea to learn what might end the Korean War. With the United Nations' acceptance of India's proposed Korean War armistice, the KPA, the PVA, and the UN Command ceased fire with the battle line approximately at the 38th parallel. Upon agreeing to the armistice, the belligerents established the Korean Demilitarized Zone (DMZ), which has since been patrolled by the KPA and ROKA, United States, and Joint UN Commands.
Document 7: Dwight D. Eisenhower: In July 1953, an armistice took effect with Korea divided along approximately the same boundary as in 1950. The armistice and boundary remain in effect today, with American soldiers stationed there to guarantee it. The armistice, concluded despite opposition from Secretary Dulles, South Korean President Syngman Rhee, and also within Eisenhower's party, has been described by biographer Ambrose as the greatest achievement of the administration. Eisenhower had the insight to realize that unlimited war in the nuclear age was unthinkable, and limited war unwinnable.
Document 8: Korean War: The Demilitarized Zone runs northeast of the 38th parallel; to the south, it travels west. The old Korean capital city of Kaesong, site of the armistice negotiations, originally was in pre-war South Korea, but now is part of North Korea. The United Nations Command, supported by the United States, the North Korean People's Army, and the Chinese People's Volunteers, signed the Armistice Agreement on 27 July 1953 to end the fighting. The Armistice also called upon the governments of South Korea, North Korea, China and the United States to participate in continued peace talks. The war is considered to have ended at this point, even though there was no peace treaty. North Korea nevertheless claims that it won the Korean War.
Document 9: Eritrea: During the Middle Ages, the Eritrea region was known as Medri Bahri ("sea-land"). The name Eritrea is derived from the ancient Greek name for Red Sea (Ἐρυθρὰ Θάλασσα Erythra Thalassa, based on the adjective ἐρυθρός erythros "red"). It was first formally adopted in 1890, with the formation of Italian Eritrea (Colonia Eritrea). The territory became the Eritrea Governorate within Italian East Africa in 1936. Eritrea was annexed by Ethiopia in 1953 (nominally within a federation until 1962) and an Eritrean Liberation Front formed in 1960. Eritrea gained independence following the 1993 referendum, and the name of the new state was defined as State of Eritrea in the 1997 constitution.[citation needed]
Document 10: Korean Armistice Agreement: The Korean Armistice Agreement is the armistice which serves to ensure a complete cessation of hostilities of the Korean War. It was signed by U.S. Army Lieutenant General William Harrison, Jr. representing the United Nations Command (UNC), North Korean General Nam Il representing the Korean People's Army (KPA), and the Chinese People's Volunteer Army (PVA). The armistice was signed on July 27, 1953, and was designed to ``insure a complete cessation of hostilities and of all acts of armed force in Korea until a final peaceful settlement is achieved. ''No`` final peaceful settlement'' has been achieved. The signed armistice established the Korean Demilitarized Zone (de facto a new border between the two nations), put into force a cease - fire, and finalized repatriation of prisoners of war. The Demilitarized Zone runs not far from the 38th parallel, which separated North and South Korea before the Korean War.
Document 11: Eritrea: In 1922, Benito Mussolini's rise to power in Italy brought profound changes to the colonial government in Italian Eritrea. After il Duce declared the birth of the Italian Empire in May 1936, Italian Eritrea (enlarged with northern Ethiopia's regions) and Italian Somaliland were merged with the just conquered Ethiopia in the new Italian East Africa (Africa Orientale Italiana) administrative territory. This Fascist period was characterized by imperial expansion in the name of a "new Roman Empire". Eritrea was chosen by the Italian government to be the industrial center of Italian East Africa.
Document 12: United Nations peacekeeping: 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). In June 2013. 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). As of 28 February 2015, 120 countries were contributing a total of 104,928 personnel in Peacekeeping Operations, with Bangladesh leading the tally (9446). 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.
Document 13: Eritrea: The Scottish traveler James Bruce reported in 1770 that Medri Bahri was a distinct political entity from Abyssinia, noting that the two territories were frequently in conflict. The Bahre-Nagassi ("Kings of the Sea") alternately fought with or against the Abyssinians and the neighbouring Muslim Adal Sultanate depending on the geopolitical circumstances. Medri Bahri was thus part of the Christian resistance against Imam Ahmad ibn Ibrahim al-Ghazi of Adal's forces, but later joined the Adalite states and the Ottoman Empire front against Abyssinia in 1572. That 16th century also marked the arrival of the Ottomans, who began making inroads in the Red Sea area.
Document 14: Korean War: In 1952, the United States elected a new president, and on 29 November 1952, the president-elect, Dwight D. Eisenhower, went to Korea to learn what might end the Korean War. With the United Nations' acceptance of India's proposed Korean War armistice, the KPA, the PVA, and the UN Command ceased fire with the battle line approximately at the 38th parallel. Upon agreeing to the armistice, the belligerents established the Korean Demilitarized Zone (DMZ), which has since been patrolled by the KPA and ROKA, United States, and Joint UN Commands.
Document 15: Eritrea: The creation of modern-day Eritrea is a result of the incorporation of independent, distinct kingdoms and sultanates (for example, Medri Bahri and the Sultanate of Aussa) eventually resulting in the formation of Italian Eritrea. In 1947 Eritrea became part of a federation with Ethiopia, the Federation of Ethiopia and Eritrea. Subsequent annexation into Ethiopia led to the Eritrean War of Independence, ending with Eritrean independence following a referendum in April 1993. Hostilities between Eritrea and Ethiopia persisted, leading to the Eritrean–Ethiopian War of 1998–2000 and further skirmishes with both Djibouti and Ethiopia.
ground_truth: 1953
sub_queries: Who approved the Korean War armistice that officially declared a ceasefire? Answer: the United Nations
largest troop contributor to the the United Nations peace keeping mission Answer: Ethiopia
When was Eritrea annexed by Ethiopia ? Answer: 1953