The Copper Harvest: How the Great War Nearly Killed Belgian Beer

Three Thousand Breweries

To understand what the First World War did to Belgian beer, you first have to understand what Belgium looked like on the morning of August 4, 1914, when the German army crossed the frontier at Gemmenich. It looked, from a brewer's point of view, like paradise. Around three thousand breweries operated in a country smaller than Maryland: one for nearly every village, and in the bigger villages, two or three, usually glaring at each other across the church square. Brussels alone held dozens of lambic brewers and blenders. Antwerp had its bolleke, Oudenaarde its old browns, Hoegaarden its cloudy white beers, and West Flanders, the province that was about to become the most fought-over strip of mud in human history, grew the hops for all of it around the little town of Poperinge.

The average Belgian of 1900 drank around 220 liters of beer a year: well over a pint a day for every man, woman, and child in the kingdom. Beer was not a treat; it was infrastructure. It was breakfast-table drink, field-labor wage, and the entire social operating system of the café, the estaminet, and the tavern. Nearly all of it was low-strength, brewed locally, and consumed within walking distance of the kettle it came from.

That kettle is the detail to hold on to. A brewing kettle of the era was a great riveted vessel of copper, the finest heat-conducting metal a craftsman could buy, hammered into shape by specialists, often the single most valuable object a village possessed after the church bells. Copper, as it happens, is also what you make shell driving-bands, wire, and munitions components from. An army that has decided to fight an industrial war measures its ambitions in exactly this metal. Belgium's misfortune was to be the country in the way, with its wealth sitting in its brewhouses, gleaming, pre-hammered, and conveniently inventoried.

The Copper Harvest

The destruction came in two waves. The first was the invasion itself: as the German army burned its way through towns like Leuven and Dinant in the late summer of 1914, breweries burned with everything else, and some were deliberately wrecked in the march west. The second wave was slower, bureaucratic, and far more thorough. Belgium spent the war under a military occupation government, and from 1917 onward, as the British naval blockade strangled Germany's access to raw materials, that government began systematically dismantling Belgian industry to feed the Reich's war machine. Machines, leather belts, wool, brass doorknobs, church bells, and above all copper: requisitioned, catalogued, carted east.

For breweries this was a death sentence delivered by paperwork. Occupation authorities requisitioned copper kettles, pipes, and fittings across the country; contemporary accounts describe breweries not merely stripped but “ruthlessly demolished” where dismantling was inconvenient. A brewery without its kettle is a barn with a chimney. Industrial production across occupied Belgium collapsed to roughly a third of its 1913 level, and brewing collapsed with it. Those brewers who limped on did so with improvised vessels, rationed barley, and beer so thin it was scarcely distinguishable from the water it was once safer than.

The monasteries were not spared. At the little Trappist abbey of Achel, on the Dutch border, the monks fled the advancing army in 1914; the occupiers took the brewery's copper kettles to melt into weapons. It is worth sitting with the timescale of that loss: Achel did not brew again until 1998. Eighty-four years. Men were born, lived full lives, and died at that abbey between the last brew of the old kettles and the first brew of the new ones. When people call beer culture fragile, this is what they mean: a tradition is a thread, and a war can cut it in an afternoon and leave three generations to stare at the ends.

And the raw material was dying too. The hop gardens of Poperinge sat directly behind the Ypres salient, close enough that the poles came down for firewood and duckboards, the fields filled with camps, casualty stations, and shell craters, and the pickers were replaced by columns of marching men. The town's surviving claim to fame from those years is not hops but Talbot House, the soldiers' club where rank stopped at the door. The hop farmers would rebuild after the armistice. Some of their customers no longer existed.

The Free Corner of Belgium

But the German army never took all of Belgium. In October 1914, the Belgians opened the sluices at Nieuwpoort and flooded the Yser plain, and the front froze along a line that left one small corner of the country, a strip of West Flanders behind the Yser and the Ypres salient, unoccupied for the entire war. Inside that strip, improbably, stood a Trappist abbey with a brewery: Sint-Sixtus at Westvleteren.

For four years the abbey lived inside the war's waiting room. From the fall of 1914 to the armistice, thousands of soldiers (French, then British) were quartered in and around the monastery, along with refugees streaming out of the shattered towns to the east. The monks who remained shared the buildings, cared for the wounded within earshot of the guns, and, remarkably, kept brewing at reduced capacity through the entire war: beer for the community, and beer for soldiers who might be dead in the salient a week later. There is no marketing copy on Earth as effective as that provenance, and Westvleteren has never needed any.

Because the Germans never reached it, Sint-Sixtus emerged in 1918 as the only Trappist brewery in Belgium still in possession of its copper. Every other monastic brewhouse had been harvested. When beer lovers today speak of Westvleteren 12 with a reverence usually reserved for relics, they are responding to the beer, of course, but they are also, whether they know it or not, responding to this: the abbey's brewing tradition is the only one in the Trappist world that passed through the twentieth century's first catastrophe physically unbroken.

Counting the Kettles

The armistice of November 11, 1918 stopped the shells. It could not restock the brewhouses. Belgium counted its breweries after the war and found roughly two thousand where three thousand had stood: a third of the industry erased in four years. And the raw number understates the wound, because what vanished was not a random third. It was disproportionately the small, the old, and the local: the village breweries whose entire capital had been one copper kettle and whose owner had neither the funds to re-equip nor, in the cruelest cases, a surviving heir to re-equip for. Some brewers had died at the front. Others came home to a hole in the ground and a requisition receipt.

Into that vacuum poured the future, and the future was golden and fizzy. Pilsner (clear, stable, modern, brewed at industrial scale by the breweries big enough to afford new equipment) had been gnawing at Belgium's old styles since the 1880s. The war handed it the market. A big brewery could rebuild with bank loans and steel; a farmhouse brewery making some ancestral local sour could not. The 1920s accelerated the consolidation that would grind Belgian brewery numbers down for the rest of the century, through the next war's copper harvest in the 1940s, all the way to a low of barely a hundred breweries by 1980. Styles died along the way. Others (faro, the old spontaneous beers of the countryside, the table beers) shrank to remnants of remnants.

If the story ended there, it would be a simple elegy. But Belgium's recovery took a turn so strange that beer historians argue about it to this day, and it started with a socialist justice minister who hated gin.

The Law That Poured Beer

On August 29, 1919, Belgium enacted the Loi Vandervelde, the alcohol law of Emile Vandervelde, minister of justice, lion of Belgian socialism, and ferocious teetotaler. Where America had just gone completely dry, Belgium threaded a needle: distilled spirits were banned from every café, pub, and public place in the kingdom. You could still buy your jenever, Belgium's beloved grain gin, but only from a shop, only for home consumption, and only two liters at a time, a minimum purchase priced deliberately beyond the daily-wage drinker. The workman's nip of gin at the counter, a fixture of Belgian life for two centuries, became contraband overnight. The law would stand until 1983.

Beer lore has built a magnificent legend on this foundation, and you will hear it in tasting rooms from Ghent to Austin: the Vandervelde law created strong Belgian beer. Deprived of gin, the story goes, Belgians demanded their alcohol from the tap instead, and the brewers obliged: Westmalle recast its dark beer in 1921, founding the modern dubbel; the Moortgat brewery launched its “Victory Ale” in 1923, the golden strong ale that a local shoemaker famously declared “a real devil,” giving Duvel its name; and the whole glorious Belgian arsenal of dubbels, tripels, and quadrupels marched out of Vandervelde's unintended consequence.

It is a wonderful story, and like most wonderful stories it deserves a footnote. Beer historians who have actually run the numbers point out that the average strength of Belgian beer barely moved: about 3.3 percent alcohol in 1900, about 3.4 in 1930. The strong beers existed, and the interbellum years genuinely birthed them, but they remained a niche; ordinary Belgians kept drinking ordinary beer, and the dubbels and tripels only conquered the country after 1950. What the law indisputably did was structural: it made the café a beer institution by force of statute. For sixty-four years, if a Belgian wanted a drink in public, that drink was beer. An entire nation's social drinking migrated to the brewer's side of the ledger, and the brewers (rebuilding anyway, on new equipment, with new ambitions) built for that captive market. The legend gets the mechanism wrong but the outcome right: the strange, strong, glorious Belgian beer culture of the twentieth century grew in a greenhouse the Vandervelde law built.

And notice the dates of what bloomed in that greenhouse. Westmalle Dubbel, 1921. Victory Ale, 1923. The rebuilt abbey of Orval laying its brewery's foundation stone in 1931 to pay for the reconstruction of the monastery itself. This is not a coincidence of calendars: the canon of modern Belgian beer is, to a startling degree, a postwar reconstruction project. The war burned the old landscape; what regrew was fewer, stronger, stranger, and (because it now had to justify itself against cheap pilsner) deliberately, defiantly distinctive. The Belgian beer the world fell in love with is not the beer of the belle époque. It is the beer of the rubble.

The Café of 1928

One more thing grew out of that rubble, and it is personal to us. In 1928, in a high-ceilinged room on the Rue Montagne-aux-Herbes Potagères in Brussels, Théophile Vossen opened the café that would become À la Mort Subite: mirrors, columns, nicotine-gold walls, and the name lifted from the sudden-death final round of the dice game his regulars played, over glasses of gueuze and faro, between errands at the National Bank around the corner. The room is still there, still pouring, essentially unchanged: one of the great surviving interiors of interbellum Brussels.

We tend to talk about that café as the origin point of our bar's name, which it is. But set it in the timeline this story has been telling and it becomes something more. The golden age of the Brussels café (the mirrored rooms, the marble tables, the beer lists as long as your arm) is the world the Vandervelde law and the postwar rebuild made: a public culture rebuilt around beer because beer was what remained, and what was allowed. When you sit at À la Mort Subite in Brussels, or at our bar on Congress Avenue, you are sitting inside the happy ending of the grimmest chapter in Belgian brewing history. The dice game got its name from sudden death. The beer culture around it earned the name honestly, and survived anyway.

That survival was never guaranteed. It had to be paid for: in copper, in barley, in eighty-four silent years at Achel, in the thousand village breweries that never came back. The correct response to a glass of Belgian beer, knowing all this, is not solemnity. Belgians would find that ridiculous. It is something closer to gratitude with foam on it.

Drinking the Aftermath in Austin

Nearly everything on our shelves is a character in this story. The Westmalle Dubbel in your chalice is the 1921 rebuild in liquid form. Duvel is Victory Ale wearing its nickname. Orval exists because a ruined abbey needed a construction budget in 1931. Achel, when we can get it, is the sound of an 84-year silence ending. And Westvleteren 12, on the rare occasions a bottle passes through Austin, is the beer of the one brewhouse the copper harvest never reached, from the abbey that spent four years sheltering soldiers a cannon-shot from the trenches.

So here is an assignment for your next visit, if you want one. Order something Belgian and strong: a dubbel, a golden ale, anything born between the wars. Hold it up to the light for a second before you drink. Somewhere behind that glass is a village brewer in 1917 watching soldiers carry his kettle out the door in pieces, certain that everything he was part of had just ended. He was wrong. It took a century, an ocean, and a bar in Texas named after a Brussels dice game to finish proving it, but he was wrong.

Ask us which beers on the current list were born in the interbellum rebuild: the answer is most of the Belgian shelf, and every one of them has a war story. In Flanders fields the poppies blow; in Austin, the taps do.