The Fantastic Medieval Theme

The “medieval theme” that underlies Chainmail and the original Dungeons & Dragons (OD&D) is loosely defined. Chainmail is a wargame meant to model combat between units of soldiers. And, for all of its innovations, OD&D grew directly from this framework. For this reason, the theme of both games is, at its core, a martial fantasy based on the Middle Ages.

The "medieval world" implied by both games seems to be populated almost exclusively by armed and armored men locked in a perpetual state of conflict, where everyone is defined by their “fighting capability”. The game’s medieval setting is not a functioning society, but a higher-order military structure: the Fighter’s path leads inevitably to building a castle and raising an army, becoming a lord in a land where the primary relationship is that of commander and soldier.

When non-combatants do appear, it is only through the narrow lens of the fighting-man’s purpose. Peasants in Chainmail game are "unwilling fighters", defined solely by their reluctant and inefficient role in battle. City folk are represented only as levies to be mobilized. The world exists to be fought over, and its people are primarily resources to be conscripted or obstacles to be overcome. The vast majority of the people who actually constituted the Middle Ages – the artisans, merchants, and clergy; the women, children, and the elderly – are almost entirely absent from the game's mechanics and implied fiction. The complex reality of medieval life (the very thing that produced the wealth and culture that made castles and knights possible) is omitted.

Still, even though both games mix history with fantasy through a rather narrow martial focus, many of their assumptions are rooted in real historical societies and conflicts. 

The Middle Ages are traditionally divided into three major phases, each shaped by distinct social, political, and cultural dynamics. The overview presented below focuses on wars and battles (in line with the core martial theme of both games) and on the “historical factions” present in Chainmail and what they were up to during each medieval period, plus the Renaissance (which Chainmail also touches on). The goal is not to be exhaustive, but to provide a historical backdrop for understanding the world that both games abstract.

Early Middle Ages (c. 500–1000) – Fragmentation after the fall of Rome

The Early Middle Ages, roughly from the late 5th to the 10th century, began with the fall of the Western Roman Empire and the emergence of new post-Roman kingdoms such as the Franks, Visigoths, and Anglo-Saxons. The economy was largely rural and local. During this time, the early foundations of feudal structures—based on vassalage and manorial organization—began to take shape. Christianity consolidated its position as the main unifying force in Western Europe, while monastic communities became vital centers of learning, literacy, and economic activity.

Several major conflicts shaped the broader political landscape. The Byzantine–Sassanian Wars (6th–7th centuries) left both sides severely weakened just before the rise of Islam. The Umayyad and later Abbasid Caliphates would go on to transform the Middle East into one of the world’s primary intellectual and commercial centers (the game refers to Middle Eastern Muslims as Saracens).

The Muslim conquests in Europe (7th–9th centuries) began when Arab-Berber forces crossed into Iberia in 711 and quickly overran the Visigothic Kingdom, establishing Umayyad rule in Spain. Expansion northward led to encounters with the Franks, most famously at the Battle of Tours in 732.

The Carolingian Wars (8th–9th centuries) included Charlemagne’s campaigns against the Saxons, Lombards, and Avars. His rise to power and the formation of the Carolingian Empire around the year 800 created a brief period of political integration in Western Europe.

The Viking Wars (8th–11th centuries) involved extensive raids, invasions, and settlement across Britain, Ireland, Francia, and the Baltic. One of the most significant episodes was the campaign of the Great Heathen Army in England (865–878), a large coalition of Viking warriors who invaded with the goal of conquering and settling Anglo-Saxon kingdoms.

In Eastern Europe, Slavic migrations reshaped the region and laid the foundations for emerging polities like early Poland and Kievan Rus’. The Magyars appeared in the 9th and 10th centuries as a powerful steppe raiding force entering Europe.

Central Asia saw the rise and fall of nomadic confederations and loose, multi-ethnic empires in the steppes, shaping the Silk Road. In the Far East, China, Japan, and Korea all experienced turbulent periods marked by dynastic transitions and political fragmentation.

High Middle Ages (1000–1300) – Castles and crusades

The High Middle Ages, spanning the 11th to the 13th centuries, were marked by demographic growth, agricultural innovation, a revival of cities and commerce, and stronger monarchies that consolidated the feudal order. The spread of the heavy plow and the three-field system increased agricultural productivity. This, in turn, supported urban expansion and the rise of merchant guilds, long-distance trade, and busy market towns.

The Normans became one of the most influential forces of the period after conquering England (1066–1071), as well as Sicily and parts of the Mediterranean. At the same time, Italian city-states such as Venice, Genoa, and Florence emerged as powerful commercial and military actors.

The Catholic Church played a major political and spiritual role. Launched by the Pope, the Crusades (1096–1291), which connected Europe more directly to the eastern Mediterranean and the Islamic world. Religious military orders such as the Hospitallers, Templars, and Teutonic Knights were founded during this period and played major roles in these conflicts against the by-then fragmented Saracen powers.

The broader Crusading movement, where “holy wars” were endorsed by the Pope against perceived enemies of Christendom, continued long after the major Crusades had failed at securing control of the Holy Land. The Reconquista in the Iberian Peninsula (11th–15th centuries) was also treated as a crusade. The Northern Crusades (12th–16th centuries) targeted pagan populations in the Baltic region. Crusades were even launched within Europe itself, most notably the Albigensian Crusade (1209–1229) against the Cathars in southern France.

This period also saw the rise of major universities such as Bologna, Paris, and Oxford. Scholars there developed scholastic philosophy and more systematic approaches to legal and theological study. Romanesque and later Gothic architecture flourished, especially in the construction of monumental cathedrals. Building a cathedral was a massive undertaking, often taking decades or even more than a century, and reflected both deep religious devotion and growing urban wealth.

In Iberia, Christian kingdoms intensified the Reconquista, gradually reclaiming territory from Muslim rule. In Eastern Europe, the Poles and Russians formed more organized kingdoms and principalities. The Magyars, having converted to Christianity, settled and established the Kingdom of Hungary, though the region remained diverse and contested.

Originally from Central Asia, the Turks had converted to Islam and reshaped the Middle East. The Byzantine–Seljuk conflicts of the 11th century, especially after the Battle of Manzikert in 1071, transformed the political landscape of Anatolia and contributed indirectly to the launch of the First Crusade.

The steppes saw the rise of the Mongols, who began expanding along the Silk Road, linking the Islamic world with China. Meanwhile, in the Far East, China under the Song dynasty became one of the most sophisticated societies of the period, with major advances in technology, commerce, and urban life. Near the end of this period, Marco Polo’s journey to China would later capture the European imagination and shape perceptions of Asia’s wealth and scale.

Late Middle Ages (1300–1500) – Crisis and transformation

The Late Middle Ages, from the 14th to the 15th centuries, were marked by crisis and upheaval in Western Europe. Famine, plague, and war placed enormous strain on society, even as new commercial centers and early forms of national identity began to emerge.

The Great Famine of 1315–1317 and the Black Death, which reached Europe in 1347, devastated the population and weakened the foundations of feudal society. Labor shortages allowed many surviving peasants to demand better conditions, contributing to greater social mobility.

Military developments also reflected shifting dynamics. In the Late Middle Ages, Flemish guild militias became known for defeating French knights, while the Swiss developed effective pike formations to face the Habsburgs.

The Hundred Years’ War (1337–1453) between England and France became one of the defining conflicts of the period. It included major battles such as Crécy, Poitiers, and Agincourt, as well as the rise of figures like Joan of Arc.

The Western Schism (1378–1417), during which rival popes claimed legitimacy, further weakened papal authority and deepened political divisions across Europe.

Italian city-states flourished as centers of commerce and mercenary warfare under condottieri. Toward the end of the period, the Italian Wars drew in France, Spain, the Holy Roman Empire, and the fragmented Italian states in a prolonged struggle for dominance.

Beyond Western Europe, the Mongol invasions of 1241–1242 had already reshaped Eastern Europe, particularly the principalities of Rus’, many of which fell under Mongol-Tatar domination for much of this period.

In the Middle East, internal divisions and the legacy of Mongol invasions created space for new powers to rise, including the Mamluks and the early Ottoman Turks. Unlike earlier Turkic groups in the region, the Ottomans developed a more centralized and durable imperial structure. The Byzantine–Ottoman Wars eventually culminated in the fall of Constantinople in 1453, ending the Byzantine Empire and marking a major shift in regional power.

Central Asia experienced a period of unified Mongol rule that increased connectivity across vast territories before fragmenting into successor khanates such as the Golden Horde. In East Asia, the Yuan dynasty ruled China under Mongol leadership until it was replaced by the Ming dynasty.

Despite all this instability, the late medieval period also saw important cultural renewal. The early Italian Renaissance began to take shape in the 14th and 15th centuries, gradually transforming European intellectual and artistic life.

The Renaissance (14th–16th c.) – The age of discovery

The Renaissance brought a cultural shift in Western Europe, beginning in the cities of Italy and later spreading across France, England, and the Low Countries. Humanism, new artistic styles, and growing scientific curiosity reshaped intellectual life and encouraged a renewed engagement with classical antiquity.

Italian city-states became the epicenter of artistic, architectural, and scholarly innovation. Cities like Florence, supported by powerful patrons such as the Medici, fostered remarkable creative output. Artists including Leonardo da Vinci, Michelangelo, and Raphael transformed visual representation through naturalism and the use of linear perspective. At the same time, these city-states declined militarily, as larger and more centralized monarchies began to overshadow their reliance on mercenary forces.

The spread of printing around 1450 greatly accelerated the exchange of knowledge, including advances in science, mathematics, and anatomy. This period also saw important changes in warfare. More centralized states, capable of financing larger and more sophisticated armies, adopted innovations such as building ‘trace italienne’ bastions designed to resist gunpowder artillery, and employing pike-and-shot formations that combined infantry and firearms. The Swiss remained one of the most feared infantry forces of the era and were widely employed as mercenaries.

Across Europe, states such as those of the Germans, Poles, and Russians became more centralized and gradually modernized their military structures.

In the Middle East, major powers including the Ottomans, Safavids, and Mamluks continued to dominate as centers of learning and commerce, even as Europe’s intellectual and economic momentum increased. The Ottoman Empire, in particular, reached a peak of power during this period and was widely feared across Europe.

Central Asian cities like Samarkand and Herat moved from the cultural flowering of the Timurid (Tartar) period to a phase of increasing political fragmentation.

European exploration expanded rapidly during this time. Portuguese and Spanish navigators pushed the boundaries of geographic knowledge, establishing new maritime routes and laying the groundwork for global connections.

In the Far East, Chinese Ming armies, Japanese Sengoku-era samurai, and Korean Joseon forces encountered European sailors for the first time. These encounters marked a significant moment, as Europeans reached East Asia by sea and began sustained contact with the region. 

(this post will be updated as my reading of Chainmail and OD&D progresses)