In Egyptian–Ethiopian War the Khedivate of Egypt Isma'il Pasha invaded the Ethiopian Empire under Yohannes IV in 1874. But the Egyptian army was ambushed by the Ethiopians at Gundet in a mountain pass . Later at Gura Egyptian demolition of trenches despite advice of foreign commander lead to their defeat at the hand of Ethiopians. POD is that Egyptians counter the ambush at Gundet and destroy the Ethiopian force. In later battles Ethiopians are defeated by clever use trenches by Egyptians.