The Napoleonic Period (1799-1815), the period Napoleon Bonaparte was the Ruler of France. The Napoleonic War (1803-1815), a series of conflicts against the French Empire. King George III feared a French invasion led by Napoleon. Hostilities ended between Great Britain and France during the French Revolutionary Wars, with the Treaty of Amiens in 1802.
Great Britain became the United Kingdom, after absorbing Ireland in 1803. However, in the same year war resumed with France again.
A victory under the commander Vice-Admiral Horatio Nelson at Battle of Trafalgar, against French and Spanish fleets. Britain now dominated the sea with the Royal Navy, trade and the empire expanded.
Britian in 1808, supported Spain and Portugal during the Peninsular War. A series of battles against the invading French, came to an end in 1814. The French army were expelled from the Iberian Peninsula back to France.
In 1812, United States declared war against the British Empire, commonly known as the War of 1812. During this period, a series of land and sea battles between the British and Americans raged. The Treaty of Ghent was signed, ending the war in 1815.
Peace briefly resumed in 1814, Emperor Napoleon I exiled to the Mediterranean island Elba. He escaped back into France in 1815 and built up the French army again.
Napoleon surrendered and exiled to the island of Elba. The Napoleonic War and the Napoleonic Period had come to an end.