Satellite imagery and analysis by the Yale Humanitarian Research Lab (Yale HRL) at the Yale School of Public Health have revealed a significant military buildup at an Ethiopian National Defense Force (ENDF) base in Assosa, Benishangul-Gumuz Region, between August 23 and 28, 2026.
The laboratory detected the arrival of approximately 100 new light tactical vehicles, distributed across three groups—roughly six times the number present on August 23. Weapons platforms were also observed on several of these vehicles, including at least five vehicles equipped with mounted weapons. Another group of approximately 15 vehicles matched the specifications of armored personnel carriers (APCs).
This buildup coincided with the arrival of at least five vehicle transporters and 14 trailers. Yale HRL estimates that the equipment is sufficient to equip a force ranging from a large battalion to a brigade, capable of transporting between 750 and 1,000 personnel.
The analysis also identified new construction activity, including the construction of a vehicle shelter, along with a clear increase in the volume of equipment and logistical materials inside the base. Yale HRL assesses that these indicators point to preparations for large-scale military activity.
The Assosa base is located approximately 100 kilometers from the Kurmuk area in Sudan’s Blue Nile State, making it a potentially strategic location for supporting cross-border operations. The report links the activity to movements associated with the Rapid Support Forces (RSF), raising concerns about a possible escalation along the Sudanese front, the potential for large-scale cross-border displacement, and heightened security and humanitarian risks in the region.
The development follows earlier indicators identified by the laboratory since late 2025 of unusual logistical activity at the same base. This adds to regional tensions and raises questions about compliance with international decisions concerning restrictions on arms supplies to parties involved in the Sudanese conflict.
Source: Yale Humanitarian Research Lab, Yale School of Public Health, August 2026.
