Constantine I is proclaimed Roman emperor by his troops.

Constantine the GreatRoman Empire

The Arch of Constantine is completed near the Colosseum in Rome to commemorate Constantine I's victory over Maxentius at the Milvian Bridge.

Arch of ConstantineColosseumMaxentiusPonte Milvio

The Edict of Pistres of Charles the Bald orders defensive measures against the Vikings.

Edict of PistresCharles the BaldVikings

Eleanor of Aquitaine married Prince Louis, later King Louis VII of France, at the Cathedral of Saint-André in Bordeaux.

Eleanor of AquitaineLouis VII of FranceBordeaux Cathedral

Battle of Ourique: The Almoravids, led by Ali ibn Yusuf, are defeated by Prince Afonso Henriques who is proclaimed King of Portugal.

Battle of OuriqueAlmoravid dynastyAli ibn YusufAfonso I of Portugal

The city of Constantinople is recaptured by Nicaean forces under the command of Alexios Strategopoulos, re-establishing the Byzantine Empire.

ConstantinopleEmpire of NicaeaAlexios StrategopoulosByzantine Empire

The naval Battle of Algeciras takes place in the context of the Spanish Reconquista resulting in a victory for the Emirate of Granada and the Maranid Dynasty over the Kingdom of Castile.

Battle of Algeciras (1278)Spanish ReconquistaEmirate of GranadaKingdom of Castile

The Battle of Molinella: The first battle in Italy in which firearms are used extensively.

Battle of Molinella

Sebastián de Belalcázar on his search of El Dorado founds the city of Santiago de Cali.

Sebastián de BelalcázarEl DoradoCali

The city of Guayaquil is founded by the Spanish Conquistador Francisco de Orellana and given the name Muy Noble y Muy Leal Ciudad de Santiago de Guayaquil.

GuayaquilConquistadorFrancisco de Orellana

Henry II of France is crowned.

Henry II of FranceCoronation

Mary I marries Philip II of Spain at Winchester Cathedral.

Mary I of EnglandPhilip II of SpainWinchester Cathedral

Don Diego de Losada founds the city of Santiago de Leon de Caracas, modern-day Caracas, the capital city of Venezuela.

CaracasVenezuela

Henry IV of France publicly converts from Protestantism to Roman Catholicism.

Henry IV of FranceProtestantismCatholic Church

James VI of Scotland is crowned king of England (James I of England), bringing the Kingdom of England and Kingdom of Scotland into personal union. Political union would occur in 1707.

James VI and IList of English monarchsKingdom of EnglandKingdom of ScotlandPersonal union

The English ship Sea Venture, en route to Virginia, is deliberately driven ashore during a storm at Bermuda to prevent its sinking; the survivors go on to found a new colony there.

Sea VentureColony of VirginiaBermuda

Ignacio de Maya founds the Real Santiago de las Sabinas, now known as Sabinas Hidalgo, Nuevo León, Mexico.

Sabinas Hidalgo, Nuevo León

Dummer's War begins along the Maine-Massachusetts border.

Dummer's WarMaineMassachusetts

British governor Charles Lawrence and the Nova Scotia Council order the deportation of the Acadians.

British EmpireCharles Lawrence (British Army officer)Nova ScotiaExpulsion of the AcadiansAcadians

French and Indian War: In Western New York, British forces capture Fort Niagara from the French, who subsequently abandon Fort Rouillé.

French and Indian WarWestern New YorkFort NiagaraFort Rouillé

American Revolutionary War: The war's last action, the Siege of Cuddalore, is ended by a preliminary peace agreement.

American Revolutionary WarSiege of Cuddalore

Wolfgang Amadeus Mozart completes his Symphony No. 40 in G minor (K550).

Wolfgang Amadeus MozartSymphony No. 40 (Mozart)

The Brunswick Manifesto is issued to the population of Paris promising vengeance if the French royal family is harmed.

Brunswick Manifesto

Horatio Nelson loses more than 300 men and his right arm during the failed conquest attempt of Tenerife (Spain).

Horatio Nelson, 1st Viscount NelsonTenerife

At Abu Qir in Egypt, Napoleon I of France defeats 10,000 Ottomans under Mustafa Pasha.

Abu QirEgyptNapoleonBattle of Abukir (1799)Ottoman Empire

War of 1812: An American attack on Canada is repulsed.

War of 1812Battle of Lundy's Lane

Costa Rica annexes Guanacaste from Nicaragua.

Costa RicaGuanacaste ProvinceNicaragua

The first commercial use of an electrical telegraph is successfully demonstrated in London by William Cooke and Charles Wheatstone.

Electrical telegraphWilliam Fothergill CookeCharles Wheatstone

Joaquin Murrieta, the famous Californio bandit known as the "Robin Hood of El Dorado", is killed.

Joaquin MurrietaCalifornio

American Civil War: The United States Congress passes the Crittenden-Johnson Resolution, stating that the war is being fought to preserve the Union and not to end slavery.

American Civil WarUnited States CongressCrittenden-Johnson ResolutionUnion (American Civil War)Slavery in the United States