Seven Years' War
The Seven Years' War was a world war fought between 1754 and 1763, the main conflict occurring in the seven-year period from 1756 to 1763. It involved every European great power of the time except the Ottoman Empire, spanning five continents, and affected Europe, the Americas, West Africa, India, and the Philippines. The conflict split Europe into two coalitions, led by Great Britain on one side and France on the other. For the first time, aiming to curtail Britain and Prussia's ever-growing might, France formed a grand coalition of its own, which ended as Britain rose as the world's predominant power, altering the European balance of power. Conflict between Great Britain and France broke out in 1754–1756 when the British attacked disputed French positions in North America and seized hundreds of French merchant ships. Meanwhile, rising power Prussia was struggling with Austria for dominance within and outside the Holy Roman Empire in Central Europe. In 1756, the major powers shifted their alliances and Prussia allied with Britain while France allied with Austria - a change known as the diplomatic revolution.
In the historiography of some countries, the war is named after combatants in its respective theaters, e.g. the French and Indian War in the United States. In French-speaking Canada, it is known as the War of the Conquest, while it is called the Seven Years' War in English-speaking Canada (North America, 1754–1763), Pomeranian War (with Sweden and Prussia, 1757–1762), Third Carnatic War (on the Indian subcontinent, 1757–1763), and Third Silesian War (with Prussia and Austria, 1756–1763).
All the participants of the Seven Years' War: [blue] Great Britain, Prussia, Portugal, with allies; [green] France, Spain, Austria, Russia, Sweden with allies.
The Seven Years' War is sometimes considered the first true world war. It restructured not only the European political order, but also affected events all around the world, paving the way for the beginning of later British world supremacy in the 19th century, the rise of Prussia in Germany, the beginning of tensions in British North America, as well as a clear sign of France's eventual turmoil.
Europe
Realizing that war was imminent, in 1756 Prussia preemptively struck Saxony and quickly overran it. The result caused uproar across Europe. Because of Prussia's alliance with Britain, Austria formed an alliance with France, seeing an opportunity to recapture Silesia (lost in the War of the Austrian Succession). Reluctantly, by following the imperial diet, most of the states of the empire joined Austria's cause. The Anglo-Prussian alliance was joined by smaller German states (especially Hanover, which remained in a personal union with Britain). Sweden, fearing Prussia's expansionist tendencies, went to war in 1757 to protect its Baltic dominions. Spain intervened on behalf of France and together they launched an unsuccessful invasion of Portugal in 1762. The Russian Empire was originally aligned with Austria, fearing Prussia's ambition on the Polish-Lithuanian Commonwealth, but switched sides upon the succession of Tsar Peter III in 1762.
Despite the huge disparity in numbers, 1756 had been successful for the Prussian-led forces on the continent. In 1757, Frederick the Great marched into the Kingdom of Bohemia. Although he won the bloody Battle of Prague and laid siege to the city, he lost the Battle of Kolin, which forced him to lift the siege and withdraw from Bohemia altogether. Things were looking grim for Prussia now, with the Austrians mobilizing to attack Prussian-controlled soil and a combined French and Reichsarmee (German states) army approaching from the west. However, at the end of 1757, the whole situation in Germany was reversed. After winning the battles of Rossbach and Leuthen, Frederick once again established himself as Europe's premier general but the Prussians were now facing the prospect of four major powers attacking on four fronts (France from the west, Austria from the south, Russia from the east, and Sweden from the north).
In 1758, following a failed invasion of Moravia, Frederick ceased his attempts to launch a major invasion of Austrian territory. The Russians invaded East Prussia, where they would remain until 1762. The years 1759 and 1760 saw several Prussian defeats, partly because of the Prussian misjudgment of the Russians and partly as a result of good cooperation between the Russian and Austrian forces. The French planned to invade the British Isles during 1759 but two sea defeats prevented the invasion. By 1761, forces on both sides were seriously depleted. In 1762, the Russian Empress Elizabeth died and her successor, Peter III, recalled Russian armies from Berlin and mediated Frederick's truce with Sweden. He also placed a corps of his own troops under Frederick's command. This turn of events has become known as "the Second Miracle of the House of Brandenburg." Frederick was then able to muster a larger army and concentrate it against Austria.
1762 brought two new countries into the war. Britain declared war against Spain and Portugal followed by joining the war on Britain's side. Spain, aided by the French, launched an invasion of Portugal and succeeded in capturing Almeida. Eventually the Anglo-Portuguese army chased the greatly reduced Franco-Spanish army back to Spain, recovering almost all the lost towns. By 1763, the war in central Europe was essentially a stalemate. Frederick had retaken most of Silesia and Saxony but not the latter's capital, Dresden. The Russian emperor had been overthrown by his wife, Catherine, who ended Russia's alliance with Prussia and withdrew from the war. Austria was facing a severe financial crisis and had to decrease the size of its army, something which greatly affected its offensive power. In 1763, a peace settlement was reached at the Treaty of Hubertusburg, ending the war in central Europe.
Battle of Leuthen by Carl Röchling, date unknown.
Frederick the Great routed a vastly superior Austrian force at the Battle of Leuthen on December 5, 1757. Frederick always called Leuthen his greatest victory, an assessment shared by many at the time as the Austrian Army was considered to be a highly professional force.
The French and Indian War
In North America, the French and Indian War (1754–1763) pitted the colonies of British America against those of New France, with both sides supported by military units from their parent countries of Great Britain and France as well as by American Indian allies. Fighting took place primarily along the frontiers between New France and the British colonies, from Virginia in the south to Newfoundland in the north. British operations in 1755, 1756 and 1757 in the frontier areas of Pennsylvania and New York all failed, due to a combination of poor management, internal divisions, effective Canadian scouts, French regular forces, and Indian warrior allies. In 1755, the British captured Fort Beauséjour on the border separating Nova Scotia from Acadia and the Acadians were expelled and American Indians driven off their land to make way for settlers from New England. Between 1758 and 1760, the British military launched a campaign to capture the Colony of Canada. They succeeded in capturing territory in surrounding colonies and ultimately the city of Quebec (1759). Though the British later lost the Battle of Sainte-Foy west of Quebec (1760), the French ceded Canada in accordance with the Treaty of Paris (1763).
Other Colonies
In the Fantastic War (1762-63) in South America, Spanish forces conquered the Portuguese territories of Colonia do Sacramento and Rio Grande de São Pedro and forced the Portuguese to surrender and retreat. Under the Treaty of Paris (1763), Spain had to return to Portugal the colony of Sacramento, while the vast and rich territory of the so-called “Continent of S. Peter” (the present day Brazilian state of Rio Grande do Sul) would be retaken from the Spanish army during the undeclared Hispano-Portuguese war of 1763–1777.
In India, the outbreak of the war in Europe renewed the long running conflict between the French and the British trading companies for influence. The war spread beyond Southern India and into Bengal and eventually eliminated French power in India.
In West Africa in 1758, the British captured Senegal and brought home large amounts of captured goods. This success convinced the British to launch two further expeditions to take the island of Gorée and the French trading post on the Gambia. The loss of these valuable colonies further weakened the French economy.
Over the course of the war in colonies, Great Britain gained enormous areas of land and influence. They lost Minorca in the Mediterranean to the French in 1756 but captured, additionally to territories in Africa and North America, the French sugar colonies of Guadeloupe in 1759 and Martinique in 1762 as well as the Spanish cities of Havana in Cuba and Manila in the Philippines, both prominent Spanish colonial cities. However, expansion into the hinterlands of both cities met with stiff resistance. In the Philippines, the British were confined to Manila until their agreed upon withdrawal at the war's end.