1810s
The 1810s was a decade of the Gregorian calendar that began on January 1, 1810, and ended on December 31, 1819.
The decade was opened with a very hostile political climate around the world. Napoleon was invading France's neighbours in efforts to build a French Empire, causing a chain of global-scaled conflicts known as the Napoleonic Wars. Here, France's Napoleonic empire saw its rise and fall through events such as Napoleon's attempts to conquer Russia, the War of 1812, and the Battle of Waterloo. Imperialism began to encroach towards African and Asian territories through trade, as the United States saw mass-scaled migration that headed westward towards the American frontier
Politics and wars
Napoleonic Wars
In 1810, the French Empire reached its greatest extent. On the continent, the British and Portuguese remained restricted to the area around Lisbon and to besieged Cádiz. Napoleon married Marie-Louise, an Austrian Archduchess, with the aim of ensuring a more stable alliance with Austria and of providing the Emperor with an heir. As well as the French Empire, Napoleon controlled the Swiss Confederation, the Confederation of the Rhine, the Duchy of Warsaw and the Kingdom of Italy. Territories allied with the French included: the Kingdom of Spain, the Kingdom of Westphalia, the Kingdom of Naples, the Principality of Lucca and Piombino, and Napoleon's former enemies, Prussia and Austria. Denmark–Norway also allied with France in opposition to Great Britain and Sweden in the Gunboat War.Image:Minard.png|thumb|left|Charles Minard's graph showing the diminishing strength of the Grande Armée during the French invasion of Russia in 1812
The French invasion of Russia of 1812 was a turning point, which reduced the French and allied invasion forces to a tiny fraction of their initial strength and triggered a major shift in European politics, as it dramatically weakened the previously dominant French position on the continent. After the disastrous invasion of Russia, a coalition of Austria, Prussia, Russia, Sweden, the United Kingdom, and a number of German States, and the rebels in Spain and Portugal united to battle France in the War of the Sixth Coalition. Two-and-a-half million troops fought in the conflict and the total dead amounted to as many as two million. This era included the battles of Smolensk, Borodino, Lützen, Bautzen, and the Dresden. It also included the epic Battle of Leipzig in October, 1813, which was the largest battle of the Napoleonic wars, which drove Napoleon out of Germany.
The final stage of the War of the Sixth Coalition, the defense of France in 1814, saw the French Emperor temporarily repulse the vastly superior armies in the Six Days Campaign. Ultimately, the Allies occupied Paris, forcing Napoleon to abdicate and restoring the Bourbons. Napoleon was exiled to Elba. Also in 1814, Denmark–Norway was defeated by Great Britain and Sweden and had to cede the territory of mainland Norway to the King of Sweden at the Treaty of Kiel.
Napoleon shortly returned from exile, landing in France on March 1, 1815, marking the War of the Seventh Coalition, heading toward Paris while the Congress of Vienna was sitting. On March 13, seven days before Napoleon reached Paris, the powers at the Congress of Vienna declared him an outlaw; four days later the United Kingdom, Russia, Austria and Prussia, members of the Seventh Coalition, bound themselves to put 150,000 men each into the field to end his rule. This set the stage for the last conflict in the Napoleonic Wars, the defeat of Napoleon at the Battle of Waterloo, the restoration of the French monarchy for the second time and the permanent exile of Napoleon to the distant island of Saint Helena, where he died in May 1821.
Spanish American wars of independence
Spain in the 1810s was a country in turmoil. Occupied by Napoleon from 1808 to 1814, a massively destructive "war of independence" ensued, driven by an emergent Spanish nationalism. Already in 1810, the Caracas and Buenos Aires juntas declared their independence from the Bonapartist government in Spain and sent ambassadors to the United Kingdom. Colombia, once become part of New Granada became the first Spanish colony in South America to declare independence from Spain on 20 July 1810 as the third oldest independent republic in the New World after Haiti and the United States. The British blockade against Spain had also moved most of the Latin American colonies out of the Spanish economic sphere and into the British sphere, with whom extensive trade relations were developed. The remaining Spanish colonies had operated with virtual independence from Madrid after their pronouncement against Joseph Bonaparte.The Spanish government in exile created the first modern Spanish constitution. Even so, agreements made at the Congress of Vienna would cement international support for the old, absolutist regime in Spain.
King Ferdinand VII, who assumed the throne after Napoleon was driven out of Spain, refused to agree to the liberal Spanish Constitution of 1812 on his accession to the throne in 1814. The Spanish Empire in the New World had largely supported the cause of Ferdinand VII over the Bonapartist pretender to the throne in the midst of the Napoleonic Wars. When Ferdinand's rule was restored, these juntas were cautious of abandoning their autonomy, and an alliance between local elites, merchant interests, nationalists, and liberals opposed to the abrogation of the Constitution of 1812 rose up against the Spanish in the New World.
File:Battle of Chacabuco.jpg|thumb|The victory of General José de San Martín over Spanish forces at the Battle of Chacabuco, 12 February 1817
The arrival of Spanish forces in the American colonies began in 1814, and was briefly successful in restoring central control over large parts of the Empire. Simón Bolívar, the leader of revolutionary forces in New Granada, was briefly forced into exile in British-controlled Jamaica, and independent Haiti. In 1816, however, Bolivar found enough popular support that he was able to return to South America, and in a daring march from Venezuela to New Granada, he defeated Spanish forces at the Battle of Boyacá in 1819, ending Spanish rule in Colombia. Venezuela was liberated June 24, 1821, when Bolivar destroyed the Spanish army on the fields of Carabobo on the Battle of Carabobo. Argentina declared its independence in 1816. Chile was retaken by Spain in 1814, but lost permanently in 1817 when an army under José de San Martín, for the first time in history, crossed the Andes Mountains from Argentina to Chile, and went on to defeat Spanish royalist forces at the Battle of Chacabuco in 1817.
Spain would also lose Florida to the United States during this decade. First, in 1810, the Republic of West Florida declared its independence from Spain, and was quickly annexed by the United States. Later, in 1818, the United States invaded Florida, resulting in the Adams-Onís Treaty, wherein Spain ceded the rest of Florida to the United States.
In 1820, Mexico, Peru, Ecuador, and Central America still remained under Spanish control. Although Mexico had been in revolt in 1811 under Miguel Hidalgo y Costilla, resistance to Spanish rule had largely been confined to small guerrilla bands in the countryside. King Ferdinand was still dissatisfied with the loss of so much of the Empire and resolved to retake it. A large expedition was assembled in Cádiz with the aim of reconquest. However, Ferdinand's plans would be disrupted by Liberal Revolution, and Ferdinand was eventually forced to give up all of the New World colonies, except for Cuba and Puerto Rico.
War of 1812
In 1812, the United States declared war on Britain in the War of 1812. The U.S. reasons for war included the humiliation in the "Chesapeake incident" of 1807, continued British impressment of American sailors into the Royal Navy, restrictions on trade with France, and arming hostile American Indians in Ohio and the western territories. United States President James Madison signed a declaration of war on June 18, 1812.The United States conducted two failed invasion attempts in 1812, first by General William Hull across the Detroit River into what is now Windsor, Ontario, and a second offensive at the Niagara peninsula. A major American success came in 1813, when the American Navy destroyed the British fleet on Lake Erie, and forced the British and their American Indian allies to retreat back toward Niagara. They were intercepted and destroyed by General William Henry Harrison at the Battle of the Thames in October 1813. Tecumseh, the leader of the tribal confederation, was killed, and his Indian coalition disintegrated.
At sea, the powerful Royal Navy blockaded much of the coastline, conducting frequent raids. The most famous episode was a series of British raids on the shores of Chesapeake Bay, including an attack on Washington that resulted in the British burning of the White House, the Capitol, the Navy Yard, and other public buildings, in the "Burning of Washington" in 1814.
Once Napoleon was defeated in 1814, France and Britain became allies and Britain ended the trade restrictions and the impressment of American sailors. Running out of reasons for war and stuck in a military stalemate, the two countries signed the Treaty of Ghent on December 24, 1814. News of the peace treaty took two months to reach the U.S., during which fighting continued. In this interim, the British made one last major invasion, attempting to capture New Orleans, but were decisively defeated with very heavy losses by General Andrew Jackson at the Battle of New Orleans in January 1815. The ending of the war opened a long era of peaceful relations between the United States and the British Empire.