1962: Ethiopia annexes Eritrea sparking the war of independence.
April 1993: Eritrea vote overwhelmingly for independence and Eritrea declares its independence.
1998-2000: Border clashes turn into a full-scale, Eritrean-Ethiopian war, claiming some 80,000 lives.
2000: Eritrea and Ethiopia agree to a ceasefire and sign a peace agreement in Algiers in December; U.N. peacekeeping forces deployed on border.
2001: Eritrea and Ethiopia begin talks on border demarcation with U.N. mediation.
2004: Ethiopia rejects commission's ruling on its border with Eritrea.
2005: The U.N. Security Council threatens Ethiopia and Eritrea with sanctions if either side uses force to settle their border dispute.
November 2007: An international boundary commission is dissolved after Ethiopia and Eritrea fail to reach an agreement on border demarcation.
July 2008: The U.N. Security Council votes unanimously to shut down its peacekeeping mission in Ethiopia and Eritrea after difficulties from both nations.
August 2009: U.N. orders Eritrea and Ethiopia to pay each other compensation for losses of property, for deaths and various forms of personal injury during their 1998-2000 border war.
April 2011: Ethiopia says it will support Eritrean rebel groups fighting to overthrow Eritrean President Isaias Afewerki.
March 2012: Ethiopia says its has attacked a military base in Eritrea, calling it an act of retaliation for Eritrean government-sponsored rebel cross-border attacks.