In medieval Europe, castles were not only a symbol of power, but also the core of military defense. Their design and construction represented the highest achievement of engineering technology at the time, and they also witnessed countless fierce offensive and defensive battles. From the Norman Conquest to the Hundred Years’ War, the offensive and defensive tactics of castles continued to evolve, ultimately shaping the unique face of medieval warfare.

The rise of the castle: from wooden forts to stone walls

Early medieval castles were mostly wooden structures, known as “wooden forts”. These castles were usually built on artificial mounds of earth and surrounded by wooden fences and trenches. Although they were quick to build and cheap to build, wooden forts were easily destroyed by fire.

With the advancement of war technology, stone castles gradually replaced wooden castles. After conquering England, the Normans built a large number of stone castles, such as the famous Tower of London. These castles have extremely tall stone walls, arrow towers and solid gates, which can effectively resist enemy attacks.

Castle defense system: iron wall

A typical medieval stone fort usually includes the following key defensive structures:

1. Curtain wall: 20 to 40 feet high, 6 to 10 feet thick, with battlements on top for archers to shoot at.

2. Arrow towers: round or square, up to 60 feet high, providing cross-fire coverage of the city walls.

3. City gate: The most vulnerable part, so the design is complex and usually equipped with drawbridges, gates and killing holes.

4. Moat: 30 to 50 feet wide and 10 to 20 feet deep, can be filled with water or spikes.

5. Inner Fort: The last line of defense, where food and weapons are stored for the defenders to hold out for a long time.

These designs made the castle extremely difficult to breach head-on, forcing attackers to adopt more complex tactics.

Siege Tactics: Breaking the Wall

Faced with strong castles, medieval armies developed a variety of siege methods:

1. Siege

The most traditional method is to force the defenders to surrender due to hunger through a long siege. In 1215, the English nobles besieged Rochester Castle for 7 weeks, and it eventually fell because the defenders ran out of food.

2. Siege Engines

Siege tower: 30 to 50 feet high, can be close to the city wall, allowing soldiers to directly climb the enemy wall.

Battering ram: covered with wet animal skins to prevent fire, used to ram city gates or weak walls.

Trebuchet: Capable of hurling 300-pound rocks or burning material at a range of 300 yards.

3. Tunnel Warfare

Engineers dug tunnels under the walls and then set fire to the supporting timbers, causing the walls to collapse. The Mongols used this method when they attacked a Hungarian castle in 1244.

4. Changes in the Firearms Era

With the advent of artillery, traditional stone walls gradually lost their defensive advantages, and castle design shifted to lower star-shaped fortresses.

Classic Battle: The ultimate battle of castle attack and defense

1. Siege of Chartres

The Vikings laid siege to Chartres in France, but the defenders used strong walls and boiling oil to repel the attack, which eventually led to the Treaty of St. Clair and the establishment of the Duchy of Normandy.

2. Siege of Acre

Richard the Lionheart led the Crusaders to attack the castle of Acre, using giant siege towers and catapults to eventually defeat the Muslim defenders.

3. Siege of Harlech Castle

During the Welsh Rebellion, English troops held Harlech Castle for nearly a year, demonstrating the value of a castle in a protracted war.

The castle’s legacy

Although gunpowder ended the military value of castles, they remain the pinnacle of medieval engineering and tactics, and thousands of them still stand across Europe today, testament to an era of war and ingenuity.

Whether it’s the towering stone walls, ingenious defensive designs or brutal sieges, the stories of castle attacks and defenses are forever engraved in the memory of history.