Gallia Belgica at the time of Julius Caesar's conquest of Gaul in 54 BCE

According to Julius Caesar, the Belgae were the inhabitants of the northernmost part of Gaul. They lived in a region stretching from Paris to the Rhine, which is much bigger than modern Belgium. But he also specifically used the Latin word "Belgium", to refer to a politically dominant part of that region, which is now in northernmost France.[1] Modern Belgium corresponds to the lands of the most northerly Belgae, the Morini, Menapii, Nervii, Germani Cisrhenani, and Aduatuci, who Caesar found particularly warlike and economically undeveloped. Caesar described this region as having strong kinship links to the Germanic tribes east of the Rhine. The area around Arlon in southern Belgium was a part of the country of the Treveri.

After Caesar's conquests, Gallia Belgica came to be the Latin name of a large Roman province covering most of Northern Gaul, including the Treveri. However, areas closer to the lower Rhine frontier, including the eastern part of modern Belgium, subsequently became part of the frontier province of Germania Inferior, which continued to interact with their neighbours outside the empire. At the time when central government collapsed in the Western Roman Empire, the Roman provinces of Belgica and Germania were inhabited by a mix of a Romanized population and Germanic-speaking Franks who came to dominate the military and political class.

During the 5th century, the area came under the rule of the Frankish Merovingian kings, who established a kingdom ruling over the Romanized population in what is northern France, and then conquered the other Frankish kingdoms. During the 8th century, this kingdom of the Franks came to be ruled by the Carolingian dynasty, whose centre of power included the area which is now eastern Belgium.[2] Over the centuries, the kingdom was divided up in many ways, but the Treaty of Verdun in 843 divided the Carolingian Empire into three kingdoms whose borders had a lasting impact on medieval political boundaries. Most of modern Belgium was in the Middle Kingdom, later known as Lotharingia, but the coastal county of Flanders, west of the Scheldt, became the northernmost part of West Francia, the predecessor of France. In 870 in the Treaty of Meerssen, modern Belgium lands all became part of the western kingdom for a period, but in 880 in the Treaty of Ribemont, Lotharingia returned to the lasting control of the Eastern king, or Holy Roman Emperor. The lordships and bishoprics along the "March" (frontier) between the two great kingdoms maintained important connections between each other. For example, the county of Flanders expanded over the Scheldt into the empire, and during several periods was ruled by the same lords as the county of Hainaut.

In the 13th and 14th centuries, the cloth industry and commerce boomed especially in the County of Flanders and it became one of the richest areas in Europe. This prosperity played a role in conflicts between Flanders and the king of France. Famously, Flemish militias scored a surprise victory at the Battle of the Golden Spurs against a strong force of mounted knights in 1302, but France soon regained control of the rebellious province.

 

The Burgundian State of Charles the Bold in the 15th century

In the 15th century, the Duke of Burgundy in France took control of Flanders, and from there they proceeded to unite much of what is now the Benelux, the so-called Burgundian Netherlands.[3] "Burgundy" and "Flanders" were the first two common names used for the Burgundian Netherlands which was the predecessor of the Austrian Netherlands, the predecessor of modern Belgium.[4] The union, technically stretching between two kingdoms, gave the area economic and political stability which led to an even greater prosperity and artistic creation.

Born in Belgium, the Habsburg Emperor Charles V was heir of the Burgundians, but also of the royal families of Austria, Castile and Aragon. With the Pragmatic Sanction of 1549 he gave the Seventeen Provinces more legitimacy as a stable entity, rather than just a temporary personal union. He also increased the influence of these Netherlands over the Prince-Bishopric of Liège, which continued to exist as a large semi-independent enclave.[5]

The Eighty Years' War (1568–1648) was triggered by the Spanish government's policy towards Protestantism, which was becoming popular in the Low Countries. The rebellious northern United Provinces (Belgica Foederata in Latin, the "Federated Netherlands") eventually separated from the Southern Netherlands (Belgica Regia, the "Royal Netherlands"). The southern part continued to be ruled successively by the Spanish (Spanish Netherlands) and the Austrian House of Habsburgs (Austrian Netherlands) and comprised most of modern Belgium. This was the theatre of several more protracted conflicts during much of the 17th and 18th centuries involving France, including the Franco-Dutch War (1672–1678), the Nine Years' War (1688–1697), the War of the Spanish Succession (1701–1714), and part of the War of the Austrian Succession (1740–1748).

Following the campaigns of 1794 in the French Revolutionary Wars, the Low Countries – including territories that were never nominally under Habsburg rule, such as the Prince-Bishopric of Liège – were annexed by the French First Republic, ending Austrian rule in the region. A reunification of the Low Countries as the United Kingdom of the Netherlands occurred at the dissolution of the First French Empire in 1814, after the abdication of Napoleon.

 

Episode of the Belgian Revolution of 1830, Gustaf Wappers, 1834

In 1830, the Belgian Revolution led to the re-separation of the Southern Provinces from the Netherlands and to the establishment of a Catholic and bourgeois, officially French-speaking and neutral, independent Belgium under a provisional government and a national congress.[6][7] Since the installation of Leopold I as king on 21 July 1831, now celebrated as Belgium's National Day, Belgium has been a constitutional monarchy and parliamentary democracy, with a laicist constitution based on the Napoleonic code.[8] Although the franchise was initially restricted, universal suffrage for men was introduced after the general strike of 1893 (with plural voting until 1919) and for women in 1949.

The main political parties of the 19th century were the Catholic Party and the Liberal Party, with the Belgian Labour Party emerging towards the end of the 19th century. French was originally the official language used by the nobility and the bourgeoisie, especially after the rejection of the Dutch monarchy. French progressively lost its dominance as Dutch began to recover its status. This recognition became official in 1898, and in 1967, the parliament accepted a Dutch version of the Constitution.[9]

The Berlin Conference of 1885 ceded control of the Congo Free State to King Leopold II as his private possession. From around 1900 there was growing international concern for the extreme and savage treatment of the Congolese population under Leopold II, for whom the Congo was primarily a source of revenue from ivory and rubber production.[10] Many Congolese were killed by Leopold's agents for failing to meet production quotas for ivory and rubber.[11] In 1908, this outcry led the Belgian state to assume responsibility for the government of the colony, henceforth called the Belgian Congo.[12] A Belgian commission in 1919 estimated that Congo's population was half what it was in 1879.[11]

 

Cheering crowds greet British troops entering Brussels, 4 September 1944

Germany invaded Belgium in August 1914 as part of the Schlieffen Plan to attack France, and much of the Western Front fighting of World War I occurred in western parts of the country. The opening months of the war were known as the Rape of Belgium due to German excesses. Belgium assumed control of the German colonies of Ruanda-Urundi (modern-day Rwanda and Burundi) during the war, and in 1924 the League of Nations mandated them to Belgium. In the aftermath of the First World War, Belgium annexed the Prussian districts of Eupen and Malmedy in 1925, thereby causing the presence of a German-speaking minority.

German forces again invaded the country in May 1940, and 40,690 Belgians, over half of them Jews, were killed during the subsequent occupation and the Holocaust. From September 1944 to February 1945 the Allies liberated Belgium. After World War II, a general strike forced King Leopold III to abdicate in 1951 in favour of his son, Prince Baudouin, since many Belgians felt he had collaborated with Germany during the war.[13] The Belgian Congo gained independence in 1960 during the Congo Crisis;[14] Ruanda-Urundi followed with its independence two years later. Belgium joined NATO as a founding member and formed the Benelux group of nations with the Netherlands and Luxembourg.

Belgium became one of the six founding members of the European Coal and Steel Community in 1951 and of the European Atomic Energy Community and European Economic Community, established in 1957. The latter has now become the European Union, for which Belgium hosts major administrations and institutions, including the European Commission, the Council of the European Union and the extraordinary and committee sessions of the European Parliament.

In the early 1990s, Belgium saw several large corruption scandals notably surrounding Marc Dutroux, Andre Cools, the Dioxin Affair, Agusta Scandal and the murder of Karel van Noppen.