On the last day of August 1944, in a village in eastern France near the Meuse River, a column of American tanks sat in the main street. None of them moved. The crews were not fighting and they were not resting. They stood on the engine decks with hoses and fuel cans, draining gasoline from some tanks and pouring it into others.

Three tanks were emptied so that one could go forward. When that tank rolled on to the next village, it stopped there as well. Across the river, a German officer watched them through his field glasses and could barely believe what he saw. For an entire month his army had been in flight.

Since the American breakout from Normandy in late July, German forces in France had been coming apart. Patton’s Third Army had swept through Brittany, turned east, crossed the Seine, and driven across northern France at a speed no one on the German side could stop or even slow. Whole German divisions had been encircled. Others had simply dissolved.

The roads leading east were choked with withdrawing men, horses, and whatever vehicles still had fuel. The officer’s own unit was part of that retreat. He knew what stood behind him. Almost nothing.

A thin screen of improvised units, rear-area troops pressed into combat, and shattered formations trying to reorganize. Beyond the rivers ahead lay the border of Germany itself, the Saar and the Rhineland, whose defenses were not ready at all. If the Americans kept advancing at the pace they had set, almost nothing would stop them. Then, for reasons he could not understand, they stopped.

It was not German resistance that halted Patton’s army at the end of August 1944. It was gasoline. What Patton did about it—the arguments, the improvisation, the pleas, the borrowing, the desperate attempts to obtain fuel—became one of the most revealing stories of the war, both about the man himself and about the machine he commanded. To understand the fuel crisis, you have to understand the pace of what came before it.

After the breakout from Normandy in late July 1944, the American armies in France changed overnight from exhausted infantry battles in the hedgerows to a war of movement. Patton’s Third Army, which began operations in early August, was the spearhead of that movement. Its armored divisions moved faster and farther than any American force before. Tank columns covered fifty miles a day.

Towns that planners had expected to reach after weeks were taken in days. The Germans ahead were in chaos, and Patton’s entire method was to never let them recover. They kept advancing, bypassing resistance, keeping the enemy off balance, and continuing forward. It was extraordinary.

It was also ravenous for fuel. A tank is a heavy machine with a huge engine, and in 1944 it consumed gasoline at a rate that was hard to believe. A Sherman tank crossing rough country might get less than two miles per gallon, often far less. An armored division contained hundreds of tanks and thousands of other vehicles—personnel carriers, trucks, jeeps, self-propelled guns, repair vehicles—and every one of them burned gas.

An armored division on the move in pursuit could consume tens of thousands of gallons in a single day. A full field army consumed hundreds of thousands. Every gallon of it had to come from the far side of the Atlantic, across the English Channel, to the beaches or through the port of Cherbourg, then be carried by truck along roads that grew longer every day as the army advanced. By the end of August the front line was hundreds of miles from the beaches.

The fuel did not run out because anyone had been careless. It ran out because of a problem built into the Allies’ entire invasion plan. The planners had expected the German army to conduct a slow, stubborn retreat across France, giving the Allies time to capture and repair ports, rebuild railroads, and extend fuel pipelines forward at a steady pace. Their timetables assumed the armies would reach the German border many months after the invasion.

Instead, after the breakout, the armies reached it within weeks. The supply system had been built for a slow campaign, and it was being asked to support a race. Ports were the first problem. Cherbourg had been taken in late June, but the Germans had wrecked the harbor completely, and repairs took time.

The Brittany ports the plan depended on were either still held by German garrisons or destroyed. The great port of Antwerp in Belgium was captured in early September, but its sea approaches remained in German hands, and it could not be used for months. The railroads were the second problem. Before the invasion, Allied air forces had deliberately bombed the French rail network to stop the Germans from moving reinforcements.

The plan had worked, but it meant that when the Allies needed those railroads themselves, they were destroyed. Bridges were down, marshaling yards ruined. Rebuilding them took time. That left the trucks.

The famous Red Ball Express, a dedicated one-way truck route carrying supplies from the beaches and Cherbourg toward the front, was established in late August and ran day and night. It was an extraordinary effort, driven largely by Black American soldiers serving in the army’s segregated transportation units, and it kept the armies alive. But trucks had their own problem. A truck carrying fuel burns fuel.

The longer the route, the more of the cargo was consumed just in delivering it. By the end of August the routes were so long that a large share of what left the beaches never reached the tanks at all. Fuel pipelines were being pushed forward from the coast, and transport aircraft were given the job of flying cans of gasoline to forward airfields. It helped.

It was not enough. Worth pausing on, because it is the heart of the problem: a truck burns a certain amount of gasoline for every hundred miles it travels. On a short route from beach to front, the truck delivers almost its whole cargo. Double the route, and the truck burns more of its own load going out and more coming back.

Double it again, and a truly alarming share of every gallon sent forward is consumed merely moving the rest. By late August the front was far enough from the coast that the Allied supply system was eating itself trying to feed the army. Adding trucks helped, but more trucks also meant burning more fuel. There was no simple way out except getting the ports and railroads working, and both took time.

On top of it all, there was a decision about priorities. In late August 1944, the supreme Allied commander, Dwight Eisenhower, had to decide where his limited supplies would go. There was not enough fuel, ammunition, and transport to keep every army advancing at full speed. Choices had to be made.

Eisenhower gave priority to the northern armies—Field Marshal Montgomery’s British and Canadian forces and the American First Army beside them—whose line of advance led toward Antwerp and the industrial Ruhr, and eventually to the airborne operation called Market Garden in mid-September. Patton’s Third Army, on the southern flank, had its supplies cut back. The figures from those days are stark. There were days in late August when the Third Army received only a small fraction of the fuel it needed for its daily operations.

The armored columns that had been covering fifty miles a day stopped in place. Patton was furious. He believed with every part of his considerable pride that his army was on the verge of breaking into Germany, that the enemy before him was beaten. He argued with Bradley, his immediate commander.

He argued with Eisenhower. He is widely quoted as having said, in one form or another, that his men could eat their belts, but his tanks had to have fuel. It is one of the most famous lines of the war, and like many of Patton’s famous quotes, its exact wording varies from source to source. But no one who knew him doubted the reality of the sentiment.

What Patton did next was a catalog of every trick a determined commander could use when ordered to stop. He kept moving as far as his fuel allowed. His instinct and his instructions to his commanders, as usually told, were to keep advancing with everything they had, and when the tanks stopped, continue on foot. Units drained their vehicles to refuel others, as the column in the opening did, so that at least some force could advance to the next river line.

He captured enemy fuel. In the chaos of the German retreat, abandoned or captured German fuel dumps were a precious prize, and the Third Army used them. Captured gasoline—in some cases tens of thousands of gallons at a time—went straight into American tanks. So did captured German food and German vehicles that could be repaired for use.

He begged and scrounged. The stories of Third Army supply officers in those weeks became legendary, and some of them are certainly exaggerated. There are tales of Third Army men showing up at fuel depots allocated to other armies and persuading the officers in charge to give them loads of gasoline, of trucks being diverted, of fuel meant for somewhere else ending up in Patton’s tanks. Some of those stories are probably true, some exaggerated, and some the kind of tale soldiers enjoy telling.

But they capture the atmosphere: an army that treated shortage as an obstacle to be bypassed rather than an order to be obeyed. He attacked under other names. When Patton was told to halt major offensive operations, he was allowed to continue what the army called reconnaissance, and his notion of reconnaissance tended to involve a great many tanks. Accounts of that period describe him pushing forward under that label, probing and advancing wherever he could, presenting his superiors with gains already made.

And he kept pressing. Patton spent much of those weeks demanding more fuel, more priority, more freedom of movement. He did not get what he wanted, but he never stopped asking. The feeling of those days at the level of a tank crew is worth pausing on.

A tank stopped for lack of fuel is not resting. It is a thirty-ton target, sitting still in country the enemy knows better than you do. Crews that had spent a month in hard driving now waited in villages and fields, aware that the German units they had been chasing were reassembling somewhere ahead. Every hour of waiting was an hour the enemy used, and the frustration rose all the way to the top.

Patton’s diary and letters from that period, and the memories of his staff, describe a commander who felt he had been stopped at the moment of victory, who believed he could see the German army collapsing before him, but who was tied down by decisions made far away. Even so, the Third Army kept advancing slowly. By the first days of September its spearheads had crossed the Meuse and reached the Moselle. The German border was close, but the momentum was gone.

On the other side of the line, the Germans used every day they were given. During September 1944, the German army in the West achieved a recovery that its own officers later described as near-miraculous. Scattered units were assembled and reorganized. Rear-area troops, training units, and air force and navy personnel were called up and sent to the front.

New military formations were created. Defensive positions along the rivers and the old border fortifications were manned. The cost of the delay appeared almost immediately. When elements of the Third Army crossed the Moselle in the first days of September, south of Metz, they met far stiffer German resistance than a few weeks earlier.

At one crossing site, an American infantry force that crossed the river was counterattacked and trapped in a small bridgehead for days, suffering heavy losses before it was pulled back. Other crossings succeeded, but slowly and at high cost. The enemy that had fled in August was fighting again in September. The key to Patton’s road forward was the city of Metz on the Moselle, a fortified city surrounded by forts built over decades, some dating to the nineteenth century, many later modernized.

The Germans packed their garrison in and prepared to defend it. When the Third Army resumed its advance in earnest, it was no longer chasing a beaten enemy. It was attacking fortified positions in autumn rains and mud, across rivers, and against forts. The Lorraine campaign that followed was one of Patton’s hardest and most frustrating battles of the war.

It lasted for months. Metz itself did not fall until late November, and its last fort held out until mid-December. The Third Army took heavy losses in that operation, in weather that turned the country into a sea of mud. The German officer on the far bank of the Meuse, watching the American tanks sitting still in the village, had just been given what his army needed most: time.

The argument has raged ever since about what would have happened if Patton had been given the fuel he asked for, and there is no simple answer. Patton and his admirers believed, then and later, that the Third Army could have broken through the disorganized German forces, crossed the border, driven into the Saar and possibly the Rhine, and shortened the war by perhaps months. Many historians are far more skeptical. The supply problem was not simply a matter of who got the fuel.

It was a problem facing the entire Allied force. Even if the Third Army had been given absolute priority, the whole supply system was strained to the breaking point, and any army driving deep into Germany would only have increased that strain. The German defenses along the border, though weak, were not nonexistent, and a spearhead that outran its supplies in enemy territory could have been cut off. There is also the question of what waited on the other side of the border.

Breaking into Germany was not like crossing France. The German population would not welcome the American army the way French towns had, and the German army, however exhausted, would fight on its own soil in defense of its homes. Eisenhower’s decision to give priority to the northern drive toward Antwerp and the Ruhr was based on sound reasons, even though the specific operation that grew out of it, Market Garden, failed. What this episode shows beyond doubt are two things.

The first is that the American way of war—with speed, firepower, and mechanized mobility the Germans could not match—depended entirely on a supply system the Germans never saw and rarely thought about. A tank is no faster than the fuel supply that supports it. In August 1944, the Americans discovered the limits of their own abundance. The second is about Patton himself.

Faced with an order to stop and a shortage he could not fix, he did not stand still. He drained his tanks, captured enemy fuel, scraped together what he could, argued, and pushed forward under whatever name he could find. It was not always obedient and not always wise, but it was the instinct that had driven his army across France—and the same instinct that, three months later, would drive him north through the snow to relieve Bastogne.