A siege is a military blockade of a city, or fortress, with the intent of conquering by attrition, or by well-prepared assault. This derives from Latin: sedere, lit. 'to sit'. Siege warfare is a form of constant, low-intensity conflict characterized by one party holding a strong, static, defensive position. Consequently, an opportunity for negotiation between combatants is common, as proximity and fluctuating advantage can encourage diplomacy.
The Battle of Dyrrachium took place from April to late July 48 BC near the city of Dyrrachium, modern day Durrës in what is now Albania. It was fought between Gaius Julius Caesar and an army led by Gnaeus Pompey during Caesar's civil war.
The Battle of Alesia or siege of Alesia was the climactic military engagement of the Gallic Wars, fought around the Gallic oppidum of Alesia in modern France, a major centre of the Mandubii tribe. It was fought by the Roman army of Julius Caesar against a confederation of Gallic tribes united under the leadership of Vercingetorix of the Arverni. It was the last major engagement between Gauls and Romans, and is considered one of Caesar's greatest military achievements and a classic example of siege warfare and investment; the Roman army built dual lines of fortifications—an inner wall to keep the besieged Gauls in, and an outer wall to keep the Gallic relief force out. The Battle of Alesia marked the end of Gallic independence in the modern day territory of France and Belgium.
Encirclement is a military term for the situation when a force or target is isolated and surrounded by enemy forces. The situation is highly dangerous for the encircled force. At the strategic level, it cannot receive supplies or reinforcements, and on the tactical level, the units in the force can be subject to an attack from several sides. Lastly, since the force cannot retreat, unless it is relieved or can break out, it must fight to the death or surrender.
A sally port is a secure, controlled entry way to an enclosure, e.g., a fortification or prison. The entrance is usually protected by some means, such as a fixed wall on the outside, parallel to the door, which must be circumvented to enter and prevents direct enemy fire from a distance. It may include two sets of doors that can be barred independently to further delay enemy penetration.
A redoubt is a fort or fort system usually consisting of an enclosed defensive emplacement outside a larger fort, usually relying on earthworks, although some are constructed of stone or brick. It is meant to protect soldiers outside the main defensive line and can be a permanent structure or a hastily constructed temporary fortification. The word means "a place of retreat". Redoubts were a component of the military strategies of most European empires during the colonial era, especially in the outer works of Vauban-style fortresses made popular during the 17th century, although the concept of redoubts has existed since medieval times. A redoubt differs from a redan in that the redan is open in the rear, whereas the redoubt was considered an enclosed work.
A bastion fort or trace italienne is a fortification in a style that evolved during the early modern period of gunpowder when the cannon came to dominate the battlefield. It was first seen in the mid-fifteenth century in Italy. Some types, especially when combined with ravelins and other outworks, resembled the related star fort of the same era.
Vallum is either the whole or a portion of the fortifications of a Roman camp. The vallum usually comprised an earthen or turf rampart (Agger) with a wooden palisade on top, with a deep outer ditch (fossa). The name is derived from vallus, and properly means the palisade which ran along the outer edge of the top of the agger, but is usually used to refer to the whole fortification.
The siege of Maastricht was fought between 9 June and 22 August 1632, when the Dutch commander Frederick Henry, Prince of Orange, eventually captured the city from Habsburg forces.
The siege of Luxembourg, in which Louis XIV of France laid siege to the Spanish-controlled Fortress of Luxembourg from 27 April to 7 June 1684, was the most significant confrontation of the War of the Reunions between France and Spain. The action caused alarm among France's neighbours and resulted in the formation of the League of Augsburg in 1686. In the ensuing war France was forced to give up the duchy, which was returned to the Habsburgs by the Treaty of Ryswick in 1697.
Sapping is a term used in siege operations to describe the digging of a covered trench to approach a besieged place without danger from the enemy's fire. The purpose of the sap is usually to advance a besieging army's position towards an attacked fortification. It is excavated by specialised military units, whose members are often called sappers.
The siege of Grol in 1627 was a battle between the Army of the Dutch Republic, commanded by Frederick Henry, Prince of Orange, and the Spanish-controlled fortified city of Grol, during the Eighty Years War and the Anglo–Spanish War in 1627. The Spanish Army, led by Hendrik van den Bergh, came to relieve Grol but too late. The siege lasted from 20 July until 19 August 1627, resulting in the surrender of the city to the Dutch army.
The fourth siege of Breda was an important siege in the Eighty Years' War in which stadtholder Frederick Henry, Prince of Orange retook the city of Breda, which had last changed hands in 1625 when the Spanish general Ambrogio Spinola conquered it for the Spanish Habsburgs. Hereafter, the city would remain in the hands of the Dutch Republic until the end of the war.
The fourth siege of Badajoz took place from July to October 1658 during the Portuguese Restoration War. It was an attempt by a huge Portuguese army under the command of Joanne Mendes de Vasconcelos, governor of Alentejo, to capture the Spanish city of Badajoz, which was the headquarters of the Spanish Army of Extremadura. The fortifications of Badajoz were essentially medieval and considered vulnerable by the Portuguese, and had already been attacked by them three times during this war.
A schanze is, according to the specialist terminology of German fortification construction, an independent fieldwork, that is frequently used in the construction of temporary field fortifications. The word is German and has no direct English equivalent, although the word sconce is derived from Dutch schans, which is cognate to the German word.
Counter-castles were built in the Middle Ages to counter the power of a hostile neighbour or as a siege castle, that is, a fortified base from which attacks could be launched on a nearby enemy castle.
The siege of Ath was a siege of the Nine Years' War. The French stockpiled 266,000 French pounds of gunpowder for the siege and used less than half of it. Consumption of other material amounted to 34,000 pounds of lead, 27,050 cannonballs, 3,400 mortar bombs, 950 grenades and 12,000 sandbags. The financial costs were 89,250 French livres. After the garrison's capitulation, 6,000 peasant workers filled up the trenches. Of the 62 French engineers present, two were killed and seven seriously wounded. This demonstration of French military potency, combined with the successful storming of Barcelona the same year, convinced the Allies to come to terms with France in the treaty of Ryswick, thus ending the war.
The siege of Bourges was a Frankish siege of the Aquitanian fortress town of Bourges in 762 during the Aquitanian War. The Frankish army under King Pepin the Short invested the fort with lines of circumvallation, contravallation and siege engines. The walls were breached and the fort taken. Count Chunibert of Bourges swore his loyalty to Pepin along with his Gascon levies and their families. Pepin appointed several counts of his own to garrison the place and the Frankish army went on to besiege Thouars.
Siege in ancient Rome was one of the techniques used by the Roman army to achieve ultimate victory, although pitched battles were considered the only true form of warfare. Nevertheless, the importance that siege action could have in the warfare framework of that era cannot be underestimated. Hannibal was unable to defeat the might of Rome because, although he had defeated the Roman armies in the open field, he had proved unable to assault the city of Rome. As time went on, the armies of the late Roman and Imperial Republics also became particularly adept at siege warfare: Gaius Julius Caesar's conquest of Gaul was the combination of a whole series of pitched battles and long sieges, culminating in that of Alesia in 52 BCE. To seize the main center of an enemy people seemed to be the best way to bring a conflict to an end, as also happened in the time of Trajan, during the conquest of Dacia, when the enemy capital, Sarmizegetusa Regia, was besieged and occupied. For this purpose, numerous works and siege machines were, therefore, required for variety and functionality, engaging soldiers in the execution of important military engineering works.
Gnaeus Domitius Corbulo used to say that the enemy was won with the hoe, that is, with construction works.
