In the spring of 1315, the rain began to fall across Europe and did not stop. It fell through planting season. It fell through summer. It fell until the wheat rotted in fields that had become marshes, until roads dissolved into mud, and until the salt that preserved meat became too damp to use. By autumn, peasants who had known nothing but expanding harvests for two centuries were watching their children starve.
This was the Great Famine of 1315-1317, and it would kill millions across a continent that had no word for what was happening to it. Historians sometimes call it the first of the fourteenth century's great crises, the opening act to the Black Death that would arrive a generation later. But that framing obscures something crucial: the famine was not merely a prelude. It was a catastrophe in its own right, one that exposed how fragile European prosperity had become—and one whose true devastation came not from the rain itself, but from what happened to the animals afterward.
Why Did Three Years of Rain Collapse Medieval Europe?
The answer lies in how little margin the medieval agricultural system had built into itself. By 1300, Europe's population had roughly tripled since the year 1000, expanding from perhaps 35 million to well over 70 million people. This was the high medieval period—cathedrals rising, universities founding, forests clearing for new farmland. But the growth had pushed cultivation onto marginal lands: hillsides that eroded easily, lowlands that flooded, soils that exhausted quickly without modern fertilizers.
When the rains of 1315 arrived, they arrived into a system already stretched thin. The bad weather began in spring, continued through what should have been summer growing months, and persisted into autumn. Hay could not be dried. Salt could not cure meat properly. Grain that did grow often sprouted mold before it could be harvested. In northern France, Flanders, England, Germany, and the Baltic regions, the 1315 harvest failed almost completely.
The following year brought no relief. Spring 1316 saw the same endless precipitation, and farmers who had eaten their seed grain during the winter had nothing to plant. By now the crisis had become self-perpetuating. Starving draft animals could not work the fields effectively. Workers weakened by hunger could not manage the intensive labor that medieval agriculture required. Even when the weather finally improved in 1317, the infrastructure of food production had been so damaged that recovery took years.
The Overlooked Variable: What Killed the Oxen
The rain receives the historical credit for the Great Famine, but the full scale of the disaster depended on something that struck after the worst weather had passed. Beginning around 1319 and peaking into 1320, a devastating cattle plague swept through England and Wales, killing what contemporary sources suggest was nearly two-thirds of all bovine animals in the country.
This Great Bovine Pestilence, as historians now call it, was a separate catastrophe layered onto an agricultural system already reeling from three years of crop failure. The disease was likely a form of rinderpest or a similar viral infection, though the exact pathogen remains debated. What is certain is its effect: it did not merely reduce the supply of beef and dairy products, though that was serious enough for a hungry population. More critically, it killed the oxen.
Oxen were the engines of medieval agriculture. Without them, ploughs did not move, fields did not get prepared, and the entire cycle of planting and harvesting slowed to a crawl. The cattle plague of 1319-1320 did not just starve people—it crippled the machinery of recovery.
Medieval farms depended on oxen for ploughing in ways that are difficult to appreciate from a modern perspective. Horses were faster but required expensive oat feed and specialized equipment; oxen ate grass and could be worked by peasants using traditional harnesses. Most manorial farms kept teams of eight or more oxen to prepare their fields. When two-thirds of those animals died within a year or two, the labor of ploughing fell increasingly on human backs and on horses whose feed requirements competed with human food supplies.
The bovine pestilence extended what might have been a three-year crisis into something closer to a seven-year nightmare. Rebuilding ox herds takes time—breeding, raising, and training draft animals is a multi-year process. Even after the rains stopped and the immediate starvation receded, England's agricultural productivity remained diminished well into the 1320s.
How Did Society Respond to Famine It Could Not Explain?
Medieval Europeans had no concept of climate patterns or disease vectors. They understood the famine as punishment, as divine wrath, as a sign that something had gone terribly wrong in the moral order of the universe. Chroniclers recorded processions of flagellants, public acts of penance, and desperate prayers for intercession. None of it made the rain stop.
Governments responded with the tools they had, which proved largely ineffective. English authorities attempted to impose price controls on grain, which predictably drove merchants to stop selling openly and created black markets. Export bans prevented grain from leaving the country but could not conjure grain that did not exist. The urban poor died in the streets of Bruges and London while the rural poor ate roots, bark, and—according to some chroniclers—each other.
The social effects outlasted the famine itself. Crime increased as desperate people stole food. Serfdom, which had been gradually loosening across much of Europe, tightened again as lords sought to keep diminished labor forces bound to the land. The institutional trust between peasants and their rulers, between townspeople and their markets, eroded in ways that would matter when the next great crisis arrived.
A Generation of Weakened Bodies
The timing of the Great Famine matters enormously for understanding what came next. Children who survived the famine years of 1315-1322 would have been in their thirties and forties when the Black Death arrived in 1347-1351. Adults who lived through the worst of the starvation would have been elderly, their bodies shaped by years of malnutrition during the most vulnerable periods of their lives.
Scholars debate how much the famine contributed to the extraordinary mortality of the plague, but the argument is plausible on its face. Populations weakened by decades of inadequate nutrition, agricultural systems still recovering from the loss of their draft animals, social institutions stressed by years of crisis—all of this provided fertile ground for the pandemic that would kill perhaps a third of Europe's people.
The Great Famine also ended an era of optimism. The twelfth and thirteenth centuries had seen consistent growth: rising populations, clearing of forests, founding of towns, expansion of trade. The famine of 1315 was the first unambiguous signal that this growth had limits, that nature could still overwhelm human ambition, that the prosperity Europeans had come to expect was neither permanent nor guaranteed.
The rain was the catalyst, but the cattle plague was the mechanism that turned a severe crisis into a generational catastrophe. Without oxen, there could be no rapid recovery. Without recovery, there was only a weakened continent waiting for the next blow to fall. When historians look for the origins of the fourteenth century's disasters, they often begin with the Black Death. They might more accurately begin with the spring of 1315, when the rain started falling and would not stop, and with the winter of 1319, when the oxen began to die.
The Great Famine killed as many as five to twelve percent of the population in the worst-affected regions. It was not a footnote to the plague—it was the first act of a century of crisis, the moment when medieval Europe learned that its long summer was ending.