Conrad von Hotzendorf
The unforgiving terrain of the middle range
An Austro-Hungarian canteen in the field
General Cadorna (left) and his staff
An Austro-Hungarian soldier
The Trentino theatre (Click map to enlarge)
Austro-Hungarian troops cutting through the wire
Alpini trudge through the snow
Austrian mountain gun in action
Austro-Hungarian soldier dressed for winter conditions
Austro-Hungarian troops brew up
Austro-Hungarian POWs at the end of the campaign
An Italian Red Cross postcard
Mountain Fury
Mid May 1916
The Italian soldiers in the Trentino were aware that something serious was about to happen in their sector. High Command was showing an unusual degree of interest in a region that was supposed to be a bit of a backwater all of a sudden there was a frantic drive to bolster the defence lines.
Since when, many men asked, had there been so much bother over the second and third lines? Surely the Austro-Hungarians had a screw loose if they were proposing to fight it out on territory that in many places was more favourable to herding mountain goats?
The answer to the last question came on May 14 when a bombardment was unleashed on Italian positions. On the next day men expecting to be on the edges of the action suddenly found themselves grappling with an attacking enemy at close quarters.
Scrambling across the harsh terrain, hordes of pike-grey uniformed infantry pressed forward as the canons continued to find other targets to pummel, while the rattle of machine guns and the crack of grenades rent the air. Expecting their opponents to flee, the Austrians found the Italians were prepared instead to fight to the last man. And so began the one of the bloodiest campaigns ever to be fought in the
The Grand Plan
Since summer 1915, when Italy dramatically entered the war on the Entente's side, Italian armies had been nibbling and biting away at Austro-Hungarian territory, particularly in the Isonzo region of the north east.
Here they had been creeping inexorably towards their ultimate goal, the
Feeling the growing pressure from the Italian Front,
Together with his Supreme Command, Conrad decided the Austro-Hungarian army would launch a grand sweep down from the Trentino mountain region and on into the Venetian Plain.
Surprise and swift movement would be needed, along with superiority in numbers. Logistical difficulties would be immense, but these, Conrad believed, were surmountable.
The actual fighting in the mountain zone, if events went according to plan, was only to be a fraction of the campaign. Once the men had pushed along the roughly 50 mile (80km) front from the
But to make the Trentino campaign work, Austro-Hungary would have to denude the Galician Front of her best men and material; yet if the Russians unleashed a well-directed offensive at the same time as the fighting raged in
Gathering Storm
Conrad asked for help from his German counterpart, Erich von Falkenhayn preferably in the shape of nine top-quality German divisions, with accompanying artillery.
Falkenhayn, however, thought Conrad's plan left to much too chance: too much depended on things going right, without much consideration for the usual mix-ups, breakdowns and misjudgements that occur in battle and down the supply chain.
Falkenhayn also considered Conrad's proposed use of 18 Divisions as too small in number 25 would be much better. Not that Falkenhayn, despite his personal misgivings, could have been much help anyway: the Germans were about to wade into what would become the bloodtub of the
Conrad, while disappointed with
Conrad moved 13 divisions away from the Eastern Front and combined them with forces in the Trentino region to produce two armies the 11th, under General Dankl, and the 3rd, under General Kφvess von Kφesshαza. The armies were placed one in front of the other and would act in tandem to give greater penetration power.
At the sharp end 157,000 men had been gathered for the fight and had 1,977 guns to support them. Overall, however, 400,000 men including vital supply and logistic units would take part in
In command at ground level was Archduke Eugen, while one of the corps was placed in the hands of Archduke Karl Franz Josef, the future (and last) Emperor of Austro-Hungary.
The Austrians were quick to get down to detailed planning solving the communications and logistics difficulties of mountain warfare were, of course, the major keys to the success of the whole operation. Joint planning between commanders in the field, however, was going to be difficult and in some cases nigh on impossible. At many points it would be left up to them to use their best judgement as events unfolded. It was hoped that the (perceived) lack of Italian morale and willingness to fight would make the job of attacking easier.
If the Austrians kept to their timetable an acceptable level of communications could be re-established once the mountain barriers were passed. More of a headache for the logisticians was the question of food and water. During the war, the Italians came to the conclusion that a soldier needed 3,900 calories a day to perform in combat conditions on the middle ranges. As for the Austrians, trying to feed 157,000 men roughly 3,900 calories a day over mountains was going to be immensely difficult and again in places impossible. Once the offensive began, a number of units were expected to have to rely on iron rations for days at a time.
Caught Napping?
Many Austro-Hungarian and German historians, and even a number of academics from Allied nations, have liked to present the Italians not just surprised by the Trentino offensive, but almost dumbfounded by its audacity and initial force.
In reality, the Italians, while not best prepared defensively, had certainly taken measures to bolster their resistance and were well aware that
Early on, General Cadorna was convinced, as were the other key strategists in the Allied nations, that
For the Italians it was most unfortunate then that General Brusati liberally interpreted his orders: a 'thrusting' general he liked to maintain an offensive stance. Instead of defence in depth, the front line remained almost the sole centre of his attention. Advance posts were pushed out as far as feasibly possible and plans continued to be made for small-scale actions to re-jig the line in
The second and third defence lines the vital jump-back points giving an army the ability to bend in defence when facing a furious assault were not well-enough developed. The fourth and final line existed, according to Cadorna, merely as a coloured marking on a map.
Adding to the dangerous nature of things, Brusati had placed his dumps of material and many artillery units up at the front end. It was a policy that played with fire; if the enemy launched an overwhelming attack, Italian forces risked being swamped. If the first line was broken, the Austrians would then be able to advance with greater ease as the bulk of Italian opposition would have been liquidated.
By early spring 1916, intelligence unequivocally pointed to an offensive in the Trentino by
Moving his headquarters to the area in April, Cadorna issued immediate orders to strengthen the defence lines. Advance points or positions that did not favour defence were re-aligned or abandoned. More reinforcements were rushed up 67 additional battalions and 20 batteries arrived, while the 9th and 10th Divisions were placed directly behind 1st Army in a supporting role. Brusati was dismissed, with General Pecori-Giraldi taking his place.
It was still hoped that the offensive would not be large enough to disrupt Cadorna's Isonzo plans and it is here that the Italian General was neglectful. Had more men been sent up to the defence lines then
As it was, the Italians still only had 118 battalions at the front, with 40 in reserve, supported by 623 guns (of which many were already antiquated). Morale in the Italian forces, however, was fairly good despite the infantryman's miserable pay, poor conditions and almost complete lack of furlough.
Mountain Thunder
With their armies in place, the Austrians were admirably prepared supply dumps had been bought forward and detailed plans disseminated down the command chain.
For the average soldier the campaign was presented in propaganda terms as a punishment expedition against the Italians for breaking her alliance with the central powers and then joining the Entente and making its surprise attack in 1915.
The prospect of food, plunder and booty once the Austro-Hungarians broke out of the mountain ranges was also alluded to. Some historians have also noted that tourist guides were supplied to a number of officers in the field a case, perhaps, of invading
The Austrians were well aware that in mountain war it was absolutely vital to secure the flanks. It was no good taking vast chunks out of the centre only to then face deadly harassing fire and counter attacks from the surrounding heights and mountains. Therefore the flanks of the theatre were to be attacked and secured first before unleashing the major assault on the centre.
Somewhat optimistically, Conrad believed his campaign could start in April, giving
On 14 May the Austrians started a short and extremely sharp bombardment. The following day the battle for the flanks began: in the west the Austrian drive started between Val Lagarina and Val d'Astico and in the Northeast, the attempt to force through the Val Sugana was initiated. In the west, the men of the Italian 37th Division were rushed by the Austrians and forced to scrabble back to Col Santo (2,115m/6,930ft). With grit and determination the Italians held on tenaciously before falling back again on 18 May.
German General von Cramon recorded the Austrian opening moves as 'magnificent'. Even the American Ambassador to
'The Austrians knew every foot of ground: mountain and valley, and their attack was admirably planned and well carried out. Both Artillery and Infantry were skilfully handled.'
In the next breath he added:
'The Italian advanced positions were swept away by the flood of shell poured out on them.'
Not all is what it seems
Although the start had been spectacular there were niggling points of worry for the Austrians the Italians, while being forced back, were not cracking. Indeed, they were putting up a spirited resistance. Speed, which was essential to Austro-Hungarian success, was also being sapped.
The attack was held up on the principal lines of resistance at Coni Zugna and Passo di Duole. From 23 to 28 May it was the scene of constant combat, the last day seeing a whole Austro-Hungarian division thrown at the enemy on a single point of resistance initially defended by one battalion from the Italian 62 Infantry.
Today, looking at the scenery it seems incredible that such actions could have taken place and on such a large scale. Woods intermingled with bare rock faces; much of the topography is uninviting to all except the experienced hiker. Having to fight over this landscape a great deal of it at hand-to-hand quarters would have pushed many men to the very limit.
The Italians soon reinforced the beleaguered defenders with five other battalions. By 30 May, the Italians despite inflicting heavy losses had been bled white. Ten officers and 148 men were dead, 28 officers and 583 men were wounded and 152 were listed as missing a total of 911 casualties noted in all. Taking this kind of loss while maintaining the position was impossible, and so the Italians were forced to withdraw yet again. With covering protection from a force of Alpini (special troops raised for mountain war) they were able to do this in order and set up new line of resistance at M. Cogolo-Novengo.
In the northeast in the Val Sugana region the Austrian advance started well, pushing aside Italian advance posts with ease. But again, the going became tougher with the more progress made. At some points, the Italians even made audacious counter-attacks. At Monte Collo (1,825m/5,985ft), for example, the Ionio Brigade held its ground then launched a localised assault, doing much to put their opponents facing them on the wrong foot.
Although pleased with the staunch defence their troops were putting up in the area, Italian Command made the sensible decision to have the line drawn back to the torrent Maso, bringing a greater degree of uniformity to the Front and easing the supply situation. Meanwhile, the Austrians resumed the offensive and from 25-26 May fought and took possession of M. Civaron, but faltered in taking Monte Cima e Monte Ravetta.
Away from these actions, fighting on the Folgaria plain started on the same day as the assaults on the flanks. Here the Austrian corps under Archduke Karl advanced against the Monte Maronia-So d' Aspio line and eventually drove the Italians back to tertiary positions on the Novegno group, south of Arsiero almost the last alpine barrier before reaching the foothills and down into the Vicenza plain. With success tantalisingly close for the Austrians, the Italians knew they had to hold firm no matter the losses. The soldiers in the field were well aware that defeat in this location could be catastrophic for the country.
The Gloves Come Off
As the Italians held on by their fingertips, action in the centre had already began on the Asiago Plain. A massed bombardment of the area started on 15 May. The shelling was on a scale unprecedented for the Italian Front: salvos pummelled the opposition, their blast effect made doubly deadly as the rocky ground they exploded on sent up showers of lethal shrapnel. The firestorm lasted until 20 May when the main offensive began.
In the very thick of the action, the Italian Palermo and Ivrea Brigades held on stubbornly, but outnumbered and outgunned they were eventually dislodged and fell back to the next line of resistance.
The speed at which the Austrians were attacking and their success at bringing up their artillery compromised this position and the Italians were soon retreating to the last marginal line of defence, but here too they held on to the death, knowing full well what the consequences would be if they faltered.
In the meantime, it was dawning on Austiran high command that their position was exactly the one they had struggled so hard to avoid. In the main, the Italian flanks had held up quite well, while in the centre although ground had been gained the opposition had not caved in as dramatically as had been expected. This made the central position (the Austrians were now in control of the best part of the Sette Communi plateau and the upper portion of the Brenta valley) a restricted place to manoeuvre in.
One Italian commentator after the war neatly summed up the situation:
'On this tableland of the Asiago [Austrian] battalions and artillery [were] all but smothered by their advance.'
This assessment was written with hindsight, of course. At the time,
Enemy at the gates
Fortunately for
Formed up in the plains, it was composed of five corps and a cavalry division (about 400,000 men in total). For three whole days, n
Knowing that the Italians would be mustering their reserves to halt their advance, the Austrians redoubled their efforts. On 25 May they attacked Monte Cimone, north of Arsiero and drove back two Alpini battalions and forced the Italians into realigning their front. Ominously for the Austrians, however, units were now being siphoned off from the theatre to return the Eastern Front, with the threat of a Russian offensive now imminent. The Austrians were also facing major difficulties with their logistics, while the Italian supply inversely improved the closer they fell back on the inner line.
By 2 June the Italians, although still on the defensive, felt that the corner had been turned. Austrian assaults seemed to lack the vigour of the first attacks. If he could gather enough reinforcements on the front within a short space of time, Cadorna believed it was possible to launch a devastating counter offensive in the region. Attacking the Austrian flanks, he would then swing his forces around the enemy, leaving the opposition trapped and weakened in a pocket. A coup de grace would then swiftly follow.
In the meantime, Cadorna got on with bolstering the men's morale: the fighting was still fierce and the danger, especially if their resolve failed, remained acute. On 3 June he issued an order declaring:
'Remember that here we defend the soil of our country and the honour of army. These positions are to be defended to death.'
On 4 June the Russians launched their long-awaited offensive and the next day marked the high tide of
After this, men and material were sent back East in earnest. Indeed, on 5 June itself, a whole division left the offensive zone. The momentum was slipping away from Austro-Hungary and now building up on the Italians side.
Fight Back
The Italians now started to drive the Austro-Hungarians back along all parts of the front. By 25 June, Austrian High Command bit the bullet and ordered their units to fall back to a pre-prepared defence line that was ahead of the starting positions, but not by much. On the same day, the Italians retook Asiago. What was once a pretty Italian mountain community was now a pile of rubble. Julian Price, a war correspondent was on hand to record the scene:
'The spectacle was but a repetition of what I had seen on the Western Front; heaps of rubble and smouldering ruin on all sides.'
Cadorna now had a choice to make: should he continue battling away at the Austrian's new defence line or return his attention to the Isonzo front? Both regions contained heavy defences, but given its topography the Austrian Trentino would be a spectacularly difficult region to fight in. And if the Austrians had proven one thing with their offensive, then it was that large-scale fighting in the middle ranges was extremely difficult.
That said, Cadorna did have momentum on his side and may have held the opportunity to inflict further defeats on an emaciated opposition. His men were also on the offensive and their morale increasing with ever yard gained.
After some deliberation, he chose to return
With the danger in the Trentino passing, the Italian public and politicians set about searching for a scapegoat for what was publicly perceived as a near disaster. They quickly chose to vent their frustration on the government, which promptly collapsed with the forced resignation of the premier Salandra. In its place, a new national government was created, which in the long term was to prove a benefit to
Butcher's Bill
Trentino had been bloodbath: the Italians lost 15,000 killed and 76,000 wounded. About 56,000 men were taken prisoner and 294 guns had been lost (although most had been put out of action as withdrawals took place). The Austrians recorded 10,000 dead, 45,000 wounded and 26,000 taken prisoner, although many statisticians believe her losses may well have been larger.
As Falkenhayn had predicted, the Austrians had bitten off more than they could chew. With only 18 divisions they could not maintain the weight of their offensive once Italian resistance stiffened. Had fresh men been available for a final push, then the last mountain barrier may well have tumbled. But even then, Cadorna's rapid organisation of the new 5th Army meant that the Austrians would then have had to face a second gruelling battle one that in all probability would have ground their advance to a halt in the alpine foothills.
As it was, the Russian offensive put the biggest spanner in the works for
Both sides learned much from the offensive,although perhaps the largest lesson was proof that a grand offensive, or a even a large counter attack, in the middle ranges was seriously hobbled by the terrain, the logistical difficulties and the high casualties inevitably taken.
Men fighting from rock face to rock face, up and down steep gradients and at high altitudes also tired quickly. Without a constant flow of fresh forces to throw into the maelstrom, the maintenance momentum absolutely vital in the offensive was impossible.
Dangerously, the Italian High Command while noting the above, did not in any appreciable way feel the need to explore in depth the initial defensive mistakes that helped facilitate much of
Even after Trentino, the notion of having strong defence lines to retire to in case of disaster was not one readily adopted by the Italians. This was to have dire consequences later in the battle of Caporetto 1917, where Austria together with Germany this time implemented a crushing defeat similar (although it too was ultimately unsuccessful) in vision to the one Conrad had conceived back in the winter of 1915.
Select Bibliography
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Jung P, The Austro-Hungarian Forces in World War I (2), Osprey, 2003
Nicolle D, The Italian Army of World War I, Osprey, 2003
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Villari L, The War on the Italian Front, Cobden Sanderson, 1932
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