Although effective against fixed positions, the Italian air campaign proved unable to inhibit Ethiopian infiltration tactics, leading to sizable Ethiopian forces maneuvering against Italian positions. However, the Regia Aeronautica excelled at reconnaissance, alerting the Italian High Command so they could quickly dispatch strong reinforcements where needed. East of Ras Immirù’s forces, Ras Sejum began a series of violent attacks against a Blackshirt Group led by Console Generale Filippo Diamanti. The most important actions by Ras Sejum took place in the Abbi Addi area, with the first big attack carried out at Debra Ambà. Thanks to those eyes in the sky, Diamanti and his men were already in place.

The day before the battle, the Ethiopians in the fort had sporadically harassed the Italians deployed on the Ambà with intense rifle fire. Feeling vulnerable, the Italians planned an attack to dislodge the Ethiopians and secure the area. A large detachment of Ethiopians intercepted the Italians as they approached Sicomoro Fort leading to a drawn-out ten-hour battle. The Ethiopians eventually retreated with heavy losses while inflicting only light casualties on the Italians thanks to weak firepower and a lack of many machine guns. Nevertheless, the action worried the Italian High Command who sent heavy reinforcements to the Abbi Addi area during the night and over the following days.

Blackshirt leaders can command Colonial units.