The novel Citadel of Ice is based on many actual events that occurred during the First World War, but like all good historical fiction, the authors took a number of liberties with the facts.
To start with the truths: an ice citadel of the kind described was in fact constructed in the Marmolada Glacier at about the same time—the winter of 1916-17, by the Austrian engineer Leo Handl. The book’s descriptions of the design and construction of the Citadel are closely based on Handl’s own writings. A smaller but very similar cittá del ghiaccio was built by the Italians under the Punta Serauta Glacier. The Italians augmented their ice city with tunnels through the soft limestone of the mountain.
The book opens with a reference to Colonel Buchholz’s body being exhumed from the ice in 1966. In fact a number of fairly well-preserved corpses of WWI soldiers have been removed from the ice, including three Austrian stretcher-bearers who were uncovered in 2004. Moreover, the Colonel’s fall from a broken cable-car is based on an actual incident recounted in Our Italian Front by Martin Hardie and Warner Allen (1920):
“When the hauling wire breaks, the cars start headlong downhill and soon run off the cable into nothingness. On one occasion an officer managed to catch hold of the cable above his head before the car fell, and he was left there suspended in mid-air. Nothing could be done for him, and the men on the mountain watched him hanging there for half an hour until his grasp failed and he was dashed to pieces.” (p. 75)
In the same vein, the recovery of two mountain-climbers from the ice, who had died in an avalanche in 1875 and were recovered 41 years later some three kilometers from the site of their death, is based on an identical incident described in Mark Twain’s A Tramp Abroad (1880).
Now for the fiction.
Melchior styles himself the inventor of trench warfare, which is a long way from the truth. Trenches had been used in Europe quite a bit prior to WWI, and even before the first Battle of St. Mihiel, which Melchior describes his part in. Trenches and other earthworks had been built around Nancy in the weeks preceding Melchior’s arrival there. However, Melchior is accurate in his view that antiquated military notions of tactics and strategy died hard in the early months of the war, and digging in was regarded as cowardly and antithetical to overrunning the enemy with charges “across grassy plains, [officers] waving their blades as they cried encouragement to the men.” This bit of fancy is necessary to develop Melchior’s motivations as a builder of a “safe and clandestine position to defend… [where], for one winter at least, over a thousand men were sheltered from the weather and from enemy fire, which allowed them to go home to their families.”
In building the Citadel, Melchior devises a miniature railroad (based on the Berlin U-Bahn) which hauls men and materials on sledges using an electric pulley, so that “a man could ride the sledge from the Payerhütte to the base of the Königspitz, wearing only a light jacket, in under an hour.” Although this is certainly a very practical idea, no such system was ever developed in the Marmolada Citadel.
The attack on Hohe Schneide did in fact take place in the spring of 1917, almost exactly as it was described in the book, using a tunnel from the Naglerspitz outpost. Indeed, the attack was prematurely launched when an Italian sentry fell through the ice and alerted the outpost with his cries. The two areas of fiction here both concern the tunnel used by the Austrians. Although Melchior uses “magnificent” sappers “with titan blood” to complete the two-kilometer tunnel in forty days, the actual tunnel took over five months to complete. Secondly, Melchior’s harpoon device to create rope-bridges over crevasses was pure invention and, given the fragile nature of ice, probably would not have worked as well as it did in the book. One reason it took the Austrians five months to build the real tunnel was that they constructed sturdy wooden bridges over each crevasse they encountered along the way. Melchior’s description of the battle being won by hurling hand grenades into the outpost is accurate.
Melchior’s story of his near death in an avalanche relies on actual descriptions of several avalanches which took place after a heavy snowfall in early December, 1916. Thousands of men on both sides were killed and most of the bodies were not recovered until the following spring. The fiction here is that the avalanche occurred on the Ortler slope near the Payerhütte. The Payerhütte is built on an outcropping of rock that was deliberately chosen by Julius Payer because it is out of the path of any avalanches.
Melchior’s escape after being buried alive is derived from a true story recounted in Die Stadt im Eis: Der Erste Weltkrieg im Innern der Gletscher (The Ice Fortress: The First World War in the Interior of a Glacier) by Michael Wachtler and Andrea de Bernardin (2009). Six Austrian soldiers survived an avalanche that destroyed their barracks on the Gran Poz:
“In a corner of the company barracks, a hollow space between boards and cliff remained. But inside were half a dozen people who had escaped the avalanche’s murderous embrace. And there was a small, iron guy among them, loaded with courage and energy, who wanted anything but a miserable death. He had only his knife, and he began to dig, moving along the broken beams and boards. It was an eternal darkness to them; they did not know whether time stood still or ran rapidly, whether they were buried hours or months. But the little man, whose name was forgotten like that of so many silent heroes, dug and drilled and comforted the others who were then crammed up behind him, and on the fifth night he came through to the air of the mountain, seeing above him the stars as though for the first time. And he cried for help, not for himself but for his comrades down there. They had been trapped for one hundred five hours.” (pp. 98-99)
As for the Russians and the Jews, they are fictitious but plausible. Russian prisoners of war were used to haul equipment up the slopes and might very well have been assigned to shovel snow. The conditions in which they lived were every bit as atrocious as those described by Melchior.
Jews volunteered and were conscripted into the Austro-Hungarian armed forces, and often bore the brunt of bigotry and hatred, although not always. Melchior was enlightened for a Bavarian of that era, but he was by no means unique. As for Jews working in the Hallein Salt Mine, there is no record that there were many, if any, Jews there—the mine was operated mainly by Bavarians—but the mine’s modernization by using water pumped in and out is factual.
A bit of trivia: Melchior von Fuchsheim’s namesake, referred to in the book as a soldier in the Thirty Years’ War who was “disliked and envied by all”, is the protagonist of the novel Simplicius Simplicissimus by Hans Jakob Christoffel von Grimmelshausen (1668).
Finally, although there was never any Ice Citadel on the Ortler, it was in fact the scene of combat at the highest elevation in recorded history, over 3,900 meters above sea level. Man may spread out into the farthest reaches of the universe, but by his very nature, he will bring his weapons and bloodshed with him.