Question: When was Eritrea annexed by the Horn of Africa country where Somali live, along with Kenya, Somalia, and the country where paintings of antelopes were found in caves?

<P0-S0> Somali people in the Horn of Africa are divided among different countries (Somalia, Djibouti, Ethiopia, and northeastern Kenya) that were artificially and some might say arbitrarily partitioned by the former imperial powers. <P0-S1> Pan-Somalism is an ideology that advocates the unification of all ethnic Somalis once part of Somali empires such as the Ajuran Empire, the Adal Sultanate, the Gobroon Dynasty and the Dervish State under one flag and one nation. <P0-S2> The Siad Barre regime actively promoted Pan-Somalism, which eventually led to the Ogaden War between Somalia on one side, and Ethiopia, Cuba and the Soviet Union on the other. <SEP> <P1-S0> During the Middle Ages, the Eritrea region was known as Medri Bahri ("sea-land"). <P1-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"). <P1-S2> It was first formally adopted in 1890, with the formation of Italian Eritrea (Colonia Eritrea). <P1-S3> The territory became the Eritrea Governorate within Italian East Africa in 1936. <P1-S4> Eritrea was annexed by Ethiopia in 1953 (nominally within a federation until 1962) and an Eritrean Liberation Front formed in 1960. <P1-S5> Eritrea gained independence following the 1993 referendum, and the name of the new state was defined as State of Eritrea in the 1997 constitution. <P1-S6> [citation needed] <SEP> <P2-S0> the earliest known cave paintings / drawings of animals are at least 35,000 years old and were found in caves in the district of maros, located in bantimurung district, south sulawesi, indonesia, according to datings announced in 2014. previously it was believed that the earliest paintings were in europe. <P2-S1> the earliest figurative paintings in europe date back to the aurignacian period, approximately 30,000 to 32,000 years ago, and are found in the chauvet cave in france, and in the coliboaia cave in romania. <P2-S2> the earliest non-figurative rock art dates back to approximately 40,000 years ago, the date given both to a disk in the el castillo cave and a hand stencil in timpuseng cave sulawesi, indonesia. <P2-S3> there are similar later paintings in africa, australia and south america, continuing until recent times in some places, though there is a worldwide tendency for open air rock art to succeed paintings deep in caves. <SEP> <P3-S0> In Djibouti, rock art of what appear to be antelopes and a giraffe are also found at Dorra and Balho. <SEP> <P4-S0> djibouti ( (listen) jih-boo-tee; afar: yibuuti, arabic: جيبوتي‎ jībūtī, french: djibouti, somali: jabuuti, officially the republic of djibouti) is a country located in the horn of africa. <P4-S1> it is bordered by eritrea in the north, ethiopia in the west and south, and somalia in the southeast. <P4-S2> the remainder of the border is formed by the red sea and the gulf of aden at the east. <P4-S3> djibouti occupies a total area of 23,200 km2 (8,958 sq mi). <P4-S4> the state of djibouti is predominantly inhabited by two ethnic groups, the somali and the afar people, the somalis being the major ethnic group of the country.