The Battle of Keren () took place from 3 February to 27 March 1941. Keren was attacked by the British during the East African Campaign of the Second World War. A force of Italian regular and colonial troops defended the position against troops mostly from Sudan and British India and Free French forces. The town of Keren, in the colony of Italian East Africa, was of tactical importance to both sides. The road and railway through Keren were the main routes to the colonial capital of Italian Eritrea at Asmara and the Red Sea port of Massawa, which surrendered to the British after the battle.
Background Eritrea
Colonised by the Italians in 1885, Italian Eritrea was used as a staging ground for Italian invasions of the Ethiopian Empire in the First and Second Italo-Abyssinian Wars. The second invasion began in 1935 and Ethiopia fell in 1936. Ethiopia, Italian Somaliland and Eritrea were combined to form Italian East Africa (Africa Orientale Italiana) part of the Italian Empire. Following the Italian declaration of war on 10 June 1940, Italian dictator Benito Mussolini ordered his troops to capture British Somaliland and border towns in the Sudan and Kenya.
Climate Eritrea has three climate zones: a coastal region of sandy plain and low scrub, a cool and fertile highland plateau in the north and the hot and arid Afar Depression in the south. The coastal region runs inland for in the east with elevations of up to and is hot and humid for most of the year, with June, September and October the hottest months. At Massawa the average temperature is and in summer can reach in the shade. Most rain falls in the summer monsoon, with occasional showers in the winter. In the escarpments and valleys, the climate is temperate with only summer monsoon rains, except close to the coast, where there is some winter rain. May is the hottest month. Approaching the highland plateau, the elevation rises steeply to , with some peaks high and the ground declines to the west. It is cooler, with the monsoon from June to September and light rain in April and May. The temperature is highest during the dry season from November to April and above , sub-alpine temperatures are found. The high ground continues into northern Ethiopia, where the mountains and ravines make ideal defensive terrain.
Middle East Command
The British responded by building up a force of more than two divisions in Sudan and three in Kenya by early February 1941. The Sudan-based forces—commanded by Lieutenant-General William Platt and under the command of General Archibald Wavell (Commander-in-Chief British Middle East Command)—had invaded Eritrea through Kassala on 18 January and by 1 February had captured Agordat about further east.
Italian Invasion of Sudan
Anglo-Egyptian Sudan shared a border with Italian East Africa. On 4 July 1940 it was invaded by an Italian force of about from Eritrea, which advanced on a railway junction at Kassala and forced the British garrison of of the Sudan Defence Force (SDF) and some local police to retire, after inflicting casualties of and for ten casualties. The Italians also drove a platoon of No 3 Company, Eastern Arab Corps (EAC) of the SDF, from the small fort at Gallabat, just over the border from Metemma, about south of Kassala and took the villages of Qaysān, Kurmuk and Dumbode on the Blue Nile. From there the Italians ventured no further into Sudan, owing to lack of fuel. They proceeded to fortify Kassala with anti-tank defences, machine-gun posts and strong-points, later establishing a brigade-strong garrison. The Italians were disappointed to find no strong anti-British sentiment among the native population.
Prelude Keren
Keren was not fortified but it is surrounded on most sides by a jumble of steep granite mountains and sharp ridges which gave the defending forces on the high ground a distinct advantage. Control of the mountains provided the Italian artillery with perfect observation of an attack. The narrow Dongolaas Gorge at through which the road and railway from Agordat to Keren passed was dominated on the south eastern side by the massif of Mount Zeban and Mount Falestoh on which stood the imposing defences of Fort Dologorodoc at . The other side of the gorge was commanded by the mass of Mount Sanchil with a saddle of secondary summits, Brig's Peak, Hog's Back and Flat Top stretching north-westwards toward Mount Sammana. In front of the Sanchil feature on its south western side was a secondary ridge, feature 1616, which became known as Cameron Ridge, overlooking the Ascidera Valley and the railway line.
Northern front The 5th Indian Infantry Division began to arrive in Sudan in early September 1940 and the 29th Indian Infantry Brigade was placed on the Red Sea coast to protect Port Sudan, the 9th Indian Infantry Brigade south-west of Kassala and the 10th Indian Infantry Brigade (William Slim) were sent to Gedaref with the divisional headquarters, to block an Italian attack on Khartoum from Goz Regeb to Gallabat, on a front of . Gazelle Force (Colonel Frank Messervy) was formed on 16 October, as a mobile unit to raid Italian territory and delay an Italian advance. Late on 30 January, Gazelle Force was ordered to pursue the Italians retreating down the road to Keren.
As the British approached Keren, Brigadier-General Nicolangelo Carnimeo, commander of the 2nd Eritrean Division and the X Territorial Defence Command, drew in the 5th Colonial Brigade and 44th Colonial Brigade from positions to the north. The 42nd Colonial Brigade had reached Keren from Agordat almost intact and the 2nd Colonial Brigade, which had suffered greater casualties there, was reforming. The 11th Regiment of the Savoia Grenadiers and the Alpini Battalion of the 10th Savoia Grenadiers had just arrived after a three-day non-stop truck journey from Addis Ababa while the 11th Colonial Brigade was also in place, having been called from reserve in Addis Ababa. The 6th Brigade, having relinquished its responsibilities at Metemma, was also making its way to Keren.
Battle 5–8 February
At 08:00 on 1 February 1941, Gazelle Force was held up in crossing the Baraka River about from Keren, where the Ponte Mussolini had been blown and the approaches to the river mined. By noon on 2 February, they were across the river and winding up the Ascidera Valley, until brought to a halt at the Dongolaas Gorge, about from Keren, where the road had been blocked by the Italians, who blew down the overhanging crags, to fill the gorge with boulders and rocks.
The 11th Indian Infantry Brigade, (4th Indian Division) arrived on 3 February, reconnoitred the next day and attacked on the left of the gorge on 5 February. The 2nd Queen's Own Cameron Highlanders fought their way to the top of the ridge called feature 1616, in front of Sanchil and on the night of 6/7 February, the 3/14th Punjab Regiment passed through and advanced onto Brig's Peak. The Indians were counter-attacked by elements of the 65th Infantry Division "Granatieri di Savoia" (Grenadiers of Savoy) who forced them back towards Cameron Ridge, which was being consolidated by (Wellesley's) the 1st Battalion/6th Rajputana Rifles. The ridge was overlooked in front by Sanchil, to the left by Mount Sammana and from behind by other mountains along the Ascidera Valley. The Cameron Highlanders and Rajputana Rifles clung on, despite frequent attacks and having to carry food, water and ammunition up hill for , across exposed terrain.
By 6 February, the 5th Indian Infantry Brigade (4th Indian Division) had arrived and next day, attacked the Dologorodoc feature east of the gorge, looping right through the Scescilembi Valley (known as Happy Valley) and then attacking from the south-east toward Acqua Col joining Mount Zelele and Mount Falestoh. On the night of 7 February, a company of (Outram's) the 4th Battalion/6th Rajputana Rifles took the col until 4:30 am, when they ran out of ammunition and were driven back to a lower feature. On 8 February, having spent most of the day under heavy artillery and mortar fire, they withdrew to their jumping-off positions.
10–13 February On the afternoon of 10 February, 3/1st Punjab Regiment attacked Brig's Peak and by the morning of 11 February were on top of Sanchil. The need for men to handle and carry supplies, ammunition and wounded meant there were only two platoons to hold the feature. Having endured heavy shelling and mortar fire throughout the day, they were forced off Sanchil and Brig's Peak with heavy casualties by a determined counter-attack from the Savoia Grenadiers. Once again the attackers were thrown onto desperate defence on Cameron Ridge. Despite the failure by the Punjabis to hold the important observation posts on Sanchil, the renewed attack on Acqua Col—planned for 12 February—went ahead. The 29th Indian Infantry Brigade of the 5th Indian Infantry Division was brought up from Barentu and put under command of Major-General Beresford-Peirse (4th Indian Infantry Division) and held in readiness to exploit a break-through.
At 05:30, supported by an intensive artillery barrage, the 4/6th Rajputana Rifles once again led the way. Richhpal Ram was less fortunate and having gained the crest, had a foot blown off and shortly thereafter was mortally wounded. He was awarded a posthumous Victoria Cross for his exploits on the Col. The 4/11th Sikh Regiment were pushing up around the side of Acqua Col but the attack could not be carried through, lacking the extra impact that might have come from the 2/5th Mahratta Light Infantry which had been diverted to reinforce the hard-pressed defences on Cameron Ridge.
Platt decided to pause, regroup and train before making a further attempt at Keren. To release road transport to bring forward supplies for a new attack, the 5th Indian Infantry Division returned to Kessala where it could be maintained by the railhead for a period of intensive training until preparations were complete and the division could be brought forward again for the offensive. Skinners Horse and most of the Motor Machine Gun companies assembled in front of Arressa and Adi Ugri to pose a threat to the Italian line of reinforcement to Keren. From the north, Briggsforce, comprising two battalions from the 7th Indian Infantry Brigade (Brigadier Harold Briggs) of the 4th Indian Infantry Division and two Free French battalions.
After crossing the border into Eritrea on the Red Sea coast, Briggsforce had captured Karora and then moved south to take Kubkub. In late February, Marching Battalion nº 3 of the Free French Orient Brigade captured Kubkub, becoming the first French unit to engage in combat against Axis forces since the Fall of France. On 1 March, Briggsforce had broken through the Mescelit pass some north-east of Keren. Briggsforce provided a third potential direction of attack to occupy the Keren defenders and created a threat to Massawa on the coast, pinning valuable reserves there.
Plan
The 4th Indian Infantry Division (Major-General Noel Beresford-Peirse) concentrated on the Sanchil side of the gorge and the 5th Indian Infantry Division (Major-General Lewis Heath) brought forward from Kessala once again, on the Happy Valley side. The Keren defences had been reinforced with the arrival of 6th Colonial Brigade from Metemma and also the 11th Blackshirt Battalion of the Savoia Grenadiers. The defenders now totalled 25,000 facing an attacking force which had grown to more than 13,000. Beresford-Pierce was to attack with the 11th Indian Brigade, expanded to five battalions, against the peaks of the Sanchil mass and 5th Brigade against Mount Sammana on the left of his front. On the 5th Division front, the Italian reinforcements on Dologorodoc meant Happy Valley was dominated by the defenders and the attackers' artillery had had to be withdrawn from their forward positions in the valley to safer locations.