Context: 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.

Question: What is the result of the incorporation of independent kingdoms and sultanates?
Answer: modern-day Eritrea

Question: When did Eritrea join a federation with Ethiopia, the Federation of Ethipia and Eritrea?
Answer: 1947

Question: What was the result of the War of Independence?
Answer: Eritrean independence

Question: What persisted and led to the Eritrean-Ethiopian War of 1998-2000?
Answer: Hostilities between Eritrea and Ethiopia

Question: What subsequently led to the Eritran War of Independence?
Answer: annexation

Question: In what year was the Sultanate of Aussa founded?
Answer: Unanswerable

Question: In what year did the Eritrean War of Independence start?
Answer: Unanswerable

Question: Who won the Eritrean-Ethiopian war of 1998-2000?
Answer: Unanswerable

Question: In what year did Eritrea first skirmish with Djibouti?
Answer: Unanswerable

Question: In what year did Italian Eritrea get founded?
Answer: Unanswerable