The Eritrean-Ethiopian War took place from May 1998 to June 2000.
Before, from 1962 until 1991, Eritrea fought a long war of independence against Ethiopia, ultimately leading to a referendum and peaceful separation in 1993. At the time of Eritrea’s independence in 1993, the border between the two countries was not demarcated, and several adjacent areas were subject to dispute.
In 1998, the border war, over the town of Badne, broke out between the two countries. Thousands of Eritrean soldiers died (19,000, according to the government; 20-50,000 by some estimates), there was massive population displacement, reduced economic development, and a severe landmine problem.
The Eritrean-Ethiopian War ended in 2000 with a negotiated agreement known as the Algiers Agreement and in April 2002 Badne was awarded to Eritrea.