Ethiopian federal forces and the pro-government Tigray Peace Force have retaken a string of strategic cities across Tigray — Mekelle, Aksum, Adwa, Adigrat, and now reportedly Rama — pushing TPLF fighters into the surrounding mountains. The offensive has been swift, with several towns falling without a fight, but the geography of the advance matters more than the speed: it is moving directly toward the Eritrean border. The Tigray Peace Force claims Eritrean troops sustained significant casualties and have retreated toward the border through the crossing town of Zalambessa. Eritrea's Information Minister Yemane Gebremeskel flatly denied the claims. Neither account can be independently verified, but ACLED — the independent conflict-monitoring organization — documented both the Eritrean withdrawal through Zalambessa and Ethiopian tanks and heavy weapons moving toward the border on Tuesday. This is the crux of the escalation risk. Ethiopia and Eritrea fought alongside each other in the brutal 2020-2022 Tigray war. That alliance has now collapsed. Addis Ababa accuses Eritrea, Sudan, and Egypt of backing a seven-group rebel alliance fighting the Abiy Ahmed government. Eritrea accuses Ethiopia of threatening its sovereignty. Diplomatic ties were severed earlier this month. Two former allies are now positioning heavy armor on opposite sides of a border town whose residents report no power, no water, and deep anxiety. The regional geometry is destabilizing. Ethiopia is simultaneously fighting an internal insurgency and accusing three neighboring states of backing it. Egypt and Sudan deny involvement, but the accusations alone reshape the diplomatic landscape across the Horn of Africa. A conflict that began as a domestic counterinsurgency operation now has the structural features of a multi-state crisis. US Secretary of State Marco Rubio's call to Prime Minister Abiy urging de-escalation signals Washington's concern about the trajectory. The State Department's framing — that the region "could not tolerate more conflict" — is diplomatic understatement for a situation where Ethiopian tanks are documented moving toward a border with a recently severed ally. The TPLF's withdrawal from Mekelle and its admission of relocating the regional administration "temporarily" suggests the group has shifted to an insurgency posture rather than holding territory. This prolongs the conflict even as the federal government claims territorial gains. Mountainous terrain in Tigray favors exactly this kind of asymmetric resistance. Zalambessa residents are the human signal. Caught between Ethiopian troops on one side and Eritrean troops on the other, without basic services, they embody the cost structure of this conflict: civilian populations bearing the full weight of a power struggle between states and armed factions, with no mechanism for their interests to be represented in the escalation calculus.
