Ethiopia and Eritrea mass forces toward Assab as the Horn edges to war
Addis has redeployed heavy weaponry and mechanised units to Afar within striking distance of Eritrea's Assab port; Abiy's Red Sea ambition and a fractured TPLF turn an old enmity into a powder keg
Summary
Ethiopia and Eritrea are sliding toward renewed war, seven years after their 2018 rapprochement. Since February 2026 Addis has redeployed federal troops to Tigray and, per Crisis Group sources, moved heavy weaponry and mechanised units into the Afar region near the Eritrean frontier — within striking distance of the port of Assab. Both governments publicly signal preparation for war. Abiy Ahmed accuses Asmara of aggression and of coordinating with a TPLF faction; analysts say he needs a unifying cause as June elections approach and has signalled that regaining Red Sea access could be it. The flashpoint to watch is the June vote: if elections cannot be held in Tigray over the TPLF's unresolved legal status, the standoff could tip past the point of return.
By the numbers
- Feb 2026 — Ethiopia begins redeploying troops to Tigray and Afar.
- ~600,000 — estimated dead in the 2020-22 Tigray war.
- 1998-2000 — the Eritrea-Ethiopia border war Abiy's 2018 deal ended.
- June 2026 — Ethiopian elections, the key flashpoint.
- Assab — the Eritrean Red Sea port within reach of the Afar buildup.
Why it matters
A war between two standing armies over Red Sea access would be the Horn's largest interstate conflict in a generation, drawing in a fractured TPLF and threatening Gulf and shipping interests. Abiy Ahmed's linkage of sea access to national renewal makes the buildup a matter of regime legitimacy, not just border security.
What to watch
- Whether the June elections proceed in Tigray and the TPLF's reaction.
- Any Ethiopian move on Assab or an Eritrean pre-emption.
- Gulf and US mediation, and the GERD/Nile dispute as a parallel pressure.
- TPLF factional alignment with Addis or Asmara.