The New Alamein declaration is a diplomatic document that does diplomatic work: Egypt, Eritrea, Somalia, and Sudan have drawn a line around Ethiopia on three fronts simultaneously. The joint statement backs Sudan's military government against the RSF, rejects unilateral Nile dam operations, and insists Red Sea access belongs to coastal states — every clause targeting a specific Ethiopian policy or ambition. This is not a peace communiqué. It is a containment architecture. The timing is precise. Ethiopia's federal forces have just retaken Mekelle from the TPLF, which withdrew from Tigray's capital as a seven-group armed alliance continues to fight the government. Addis Ababa has accused Egypt, Eritrea, and Sudan of backing that alliance directly — a charge all three deny. Eritrea's Information Minister Yemane Gebremeskel countered on X that Ethiopia is fabricating a pretext to attack Eritrea. The accusations are now flying in both directions, and the declaration lands in the middle of active combat. The structural picture is a classic encirclement dynamic. Ethiopia is landlocked, surrounded by signatories or their allies, dependent on Djibouti for port access, and now facing a multi-front insurgency that its neighbours may or may not be fuelling. The declaration's Red Sea clause — control belongs to coastal states — is a direct rebuke of Ethiopia's pursuit of sovereign sea access and a naval presence, a long-standing ambition that alarmed Somalia and Egypt alike. Somalia's President Mohamud offered a narrow carve-out: commercial port access is negotiable, sovereignty is not. The Nile dispute remains the deepest structural fault line. Egypt and Sudan's warning against 'unilateral measures' targeting downstream states is the Grand Ethiopian Renaissance Dam by another name. That dam controls Nile flow for 150 million people downstream. The declaration formalises what was previously bilateral Egyptian-Sudanese opposition into a four-state position. Sudan's inclusion is the most cynical element. The declaration backs the military-led government of Abdel Fattah al-Burhan in a civil war that has displaced millions and produced credible reports of atrocities on multiple sides. 'A political process led by Sudanese parties' is diplomatic language for backing the army against the RSF while appearing neutral. Ethiopia and Sudan have traded accusations of interference in each other's conflicts — a mutual destabilisation loop that this declaration does nothing to break. The internal Ethiopian situation is deteriorating fast. The TPLF's withdrawal from Mekelle — framed as a tactical repositioning — follows the 2022 Pretoria peace deal's collapse in practice if not in name. Former Tigray interim leader Abraham Belay announced preparations for a new temporary administration and regional elections within months, but elections amid active multi-front fighting are aspirational at best. The seven-group armed alliance represents a broader fragmentation of Ethiopian opposition that extends well beyond Tigray. What emerges is a Horn of Africa splitting into two camps: a four-state bloc coalescing around shared opposition to Ethiopian regional dominance, and an increasingly isolated Ethiopia fighting internal wars while accusing its neighbours of proxy warfare. Neither camp is building anything generative. The declaration creates no new institutions, no trade frameworks, no shared infrastructure — only a formalised opposition front. If this pattern holds for twenty years, the Horn becomes a permanent conflict zone with rotating proxy wars and zero-sum resource competition over the Nile and Red Sea.