On 12 January, Aosta had sent a regiment of the 65th Infantry Division "Granatieri di Savoia" (General Amedeo Liberati) and three colonial brigades to Keren. The 4th and 5th Indian Infantry Divisions advanced eastwards from Agordat into the rolling countryside, which gradually increased in elevation towards the Keren Plateau, through the Ascidira Valley. There was an escarpment on the left and a spur rising to on the right of the road and the Italians were dug in on heights which dominated the massifs, ravines and mountains. The defensive positions had been surveyed before the war and chosen as the main defensive position to guard Asmara and the Eritrean highlands from an invasion from Sudan. On 15 March, after several days of bombing, the 4th Indian Division attacked on the north and west side of the road to capture ground on the left flank, ready for the 5th Indian Division to attack on the east side.