Friedrich II: The Prussian Response to the Lessons of Poltava
The 1st Battalion of the Prussian Life Guards at the Battle of Kolin (1757). The author of this historical paintings by Richard Knötel
In the summer of 1709, near Poltava, Swedish infantry advanced on Russian redoubts through rifle and cannon fire from a fortified line, fired from static positions. Half a century later, the Prussian line advanced differently: light guns rolled alongside them, and the fire followed the soldier all the way to the enemy. Between these two images lies the work of an entire generation of military thought. Poltava didn't end the war. It vividly illustrated the question that Europe wrestled with for another half-century: what to replace naked assault with when it no longer works.
Poltava as a frontier
Poltava closed the era known as the Caroline War, named after the Swedish king Charles XII. Its creed was simple: the outcome was decided by the onslaught, the bayonet charge at any cost, a will that broke the enemy's line before they could fire a second shot. At Poltava, this model was shattered by the prepared defenses, the system of redoubts. artillery and a disciplined front. Attacking courage was thwarted by engineering and fire.
It's important to note: there was no instantaneous epiphany here. Lessons of this magnitude are learned over generations, through headquarters, treatises, and the memories of officers who themselves stood under cannonballs. By the mid-18th century, a shift became noticeable. Military theorists increasingly discussed heroic impulse and increasingly considered the relationship between artillery, fortifications, infantry, and cavalry. Poltava proved to be something of a laboratory for a new kind of war, a war of fire, order, engineering, and maneuver.
The essence of the change isn't that bravery has become devalued. Courage is no longer sufficient. In a battle against an organized defense, tenacity is of little consequence; the organization of the troops is decisive. The defender meets the attack with organized fire and field fortifications, and the question abandoned by Poltava arises in all its glory: how to replace an onslaught that has lost its force.
Army without handwriting
The answer was sought throughout Europe, but it took shape most clearly in Prussia. By the time Frederick II ascended the throne in 1740, he had inherited an army of rare quality. His father, Frederick William I, had elevated drill to a cult. The "Long Prussians," the tall grenadiers of the royal guard, were a household name, and the discipline of the Prussian infantry was unparalleled. A soldier reloaded his rifle almost mechanically, maintaining his step and line with the precision of a machine.
But it was a tool without a method. The army existed, but there was no system for its deployment; what was missing was a commanding hand, a vision that would transform a well-oiled machine into a means of victory. Friedrich Wilhelm assembled and drilled the army. It was up to his son to command it.
Frederick II's task proved more complex than that of the previous century's commanders. He had to learn to defeat armies that already knew how to defend themselves with artillery and formation. Frightening such an enemy with a bayonet charge was impossible: they didn't scatter, but stood their ground and responded with a volley. The only solution was to outmaneuver them with speed, calculation, and the coordination of their arms.
Battle of Hohenfriedberg, "Charge of the Prussian Infantry", painting by Carl Röchling
Fire that moves
The first thing Frederick rethought was the role of artillery. He didn't invent it from scratch, however. Gustav II Adolf had already begun to break with the tradition of the static battery in the 17th century. He introduced light regimental cannons capable of moving alongside the infantry and distributed the guns throughout the battle line. But over the course of a century, this trend took hold slowly. The classic field batteries of the early 18th century still often occupied fixed positions and played the role of heavy, immobile force. Artillery remained a prelude: it thundered before the attack, and then the battle moved forward without it.
Friedrich took the old idea to its extreme. Light batteries were to move with the battle line and support the attack with fire throughout its entire course, not just before it began. This principle was carried to its furthest extent by the Prussian horse artillery, which appeared in 1759. Its crews rode on horseback and reached dangerous areas as quickly as the cavalry. This wasn't a sudden invention, but a radical development of a long-cherished idea: now fire could gallop in the wake of the attack.
Here lies the dividing line between two eras. The Swedes at Poltava broke through redoubts under sustained fire. The Prussians approached battle under their own mobile fire cover, which moved alongside them. Frederick applied the same principle to the infantry. The Prussian formation didn't simply stand and fire; it moved and fired, maintaining order. The static line became a maneuvering one, and its stability under fire became its main asset.
"The Battle of Zorndorf," painted by Alexander Kotzebue in 1852, depicts a battle during the Seven Years' War that took place on August 14 (25), 1758, between the Russian and Prussian armies. The battle is considered one of the bloodiest of that war and ended in an indecisive outcome, as both sides suffered heavy losses.
A system instead of amateurism
Frederick's true answer to Poltava's question lay deeper than isolated improvements. In the wars of the previous century, armies often operated as several parallel forces: infantry on its own, cavalry on its own, artillery in the background. Each branch fought its own war. Frederick linked them into a single scenario, in which no unit was allowed to act alone.
The roles were assigned in advance:
- the infantry creates a front and pins down the enemy, preventing him from reorganizing;
- artillery rains down fire on key areas, shaking the defense and undermining the will to resist;
- The cavalry delivers a decisive blow to the flank or rear when resistance has already been broken.
It's important not to fall into convenient simplifications here. Frederick didn't have a single recipe for every situation; he thought about each branch of the military separately, sometimes even in direct opposition. Infantry defended themselves against cavalry through formation discipline: maintain a tight line or square and fire along the front, while the cavalry either broke against this "hedgehog" or retreated empty-handed. Frederick prescribed something entirely different for his own cavalry. Seydlitz's horsemen were built for a preemptive strike, for initiative, for the enemy to feel the onslaught first. He ordered the infantry to stand and fire, but demanded the exact opposite from the cavalry: to strike first.
The ultimate expression of this approach was the oblique battle formation. Instead of a uniform line across the entire front, Frederick concentrated his forces on one wing, advancing it forward in a ledge, giving the line an oblique, slanted outline. There, an overwhelming superiority of infantry and artillery was created, and the entire force fell upon the chosen sector while the cavalry completed the rout. At Leuthen on December 5, 1757, this technique brought victory over a numerically superior enemy and became the hallmark of the Prussian school.
Behind these mechanics lay a new philosophy of war, war as calculation. In his "General Principles of War," compiled for generals in 1748, Frederick formulated the requirements for a commander:
You need to foresee everything, recognize all the difficulties and know how to eliminate them.
His belief in a decisive general battle stemmed from the same logic. Since an army is a precise instrument for a single blow, wasting it on protracted maneuvering is wasteful, and its strength should be applied to the most important things:
War is decided only by battles and does not end otherwise than by them.
The Battle of Kunersdorf, which took place on August 1 (12), 1759. The artist Alexander Evstafievich Kotzebue painted the painting.
Moritz of Saxony: the battlefield as a stage
There was another answer to a similar challenge, though linking it directly to Poltava would be too bold. It was provided by Maurice of Saxony (1696–1750), a Marshal of France, a practitioner and theorist whose pinnacle was the victory at Fontenoy in 1745. He belonged to a different military culture, and his thought moved in a direction opposite to that of Prussia. His approach can be seen as a response to the same problem posed by Poltava, but interpreted in a different way.
Maurice laid out his ideas in the treatise "My Dreams" (Mes Rêveries), written around 1732 and published after his death. He emphasized flexibility, exploitation of terrain, and careful positional preparation. Mixed battle formations, field fortifications, redoubts, and fortified camps—these were his tools. For Maurice, the battlefield wasn't just a place of clashes. He designed it in advance: some areas were made deadly dangerous for the attacker, while others were transformed into traps.
There's a kinship with Friedrich here: both understood war as a system, not a collection of isolated exploits. They differed on a key point. Friedrich relied on aggressive maneuvers and oblique attacks. Moritz prepared the terrain and forced the enemy to attack where they were most vulnerable. He spoke of the price of such preparation as a way to outmaneuver fate:
This is how, through skillful measures, one can make happiness lean in one’s favor.
This phrase reflects the same change that was brewing after Poltava. Success in battle, then, was also a matter of calculation, and was no longer expected as a gift.
Two poles of Europe
Thus, Europe responded to the imminent challenge in two different ways. The Prussians built their army for a single, devastating blow, all for the sake of speed and concentration of force at the right point. Maurice in France worked differently: he prepared not so much an army for the blow, but rather a flexible and well-planned space where the enemy would enter a disadvantageous position.
Both approaches grew out of a shared rejection of reliance on sheer courage, and both produced a long legacy. Frederick's ideas formed the foundation of the maneuver-strike tradition, through which 18th-century tactics extended to Napoleon's military art, who also sought to defeat the enemy in a single decisive battle. The Moritz Line nurtured something else: field fortifications, mixed formations, and a "theatrical" approach to campaigning, where terrain and preparation mattered no less than the force of the blow.
The debate here isn't about rightness, but about the pace of war, and each side managed that pace in its own way. Friedrich reduced everything to a single decisive hour. Moritz took his time with that hour, prolonging the war in advance and preparing the terrain long before the enemy set foot on it. Both schools outlived their founders and diverged widely.
Poltava is significant not only as a Russian victory. It sparked a long debate among European theorists about how to fight in the age of artillery, discipline, and science. This debate was carried out in treatises, manuals, and staff calculations. Frederick II spoke out louder than many. Maurice of Saxony, more quietly, but his line was never dislodged. Both men were guided by the same vision: the Swedes at Poltava were advancing on the redoubts and failed to reach them. Each then sought, in their own way, to avoid repeating their path.
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