History

9th century (AD 801–900): a century of political change and cultural exchange 9th century Survey of the 9th century (AD 801–900): major political reorganizations, Viking expansion, Carolingian and Abbasid cultural growth, missionary activity, trade networks, and technol…

Ab urbe condita — Roman chronological era Ab urbe condita Latin for “from the founding of the City,” a Roman system of year numbering tied to the traditional foundation of Rome (commonly dated to 753 BC). Used in ancient historiography an…

Abbasid Caliphate The Abbasid Caliphate (750–1258) was a major Islamic dynasty centered in Baghdad that advanced administration, culture, and sciences while confronting internal fragmentation and ex…

Abdülaziz: Ottoman Sultan (1830–1876) — reign, reforms, and legacy Abdülaziz Abdülaziz (1830–1876) was the 32nd Ottoman Sultan and a recognized caliphal figure. His 1861–1876 reign combined modernization and European engagement with mounting debt, political…

Abolitionism: the movement to end slavery and its global impact Abolitionism Abolitionism was a broad political, moral and religious movement to end slavery. This article explains its origins, strategies, regional differences, key effects and lasting legacy…

Achaemenid Empire (c. 550–330 BC) Achaemenid Empire The Achaemenid Empire was the first Persian imperial state, founded by Cyrus the Great. It became the largest state of classical antiquity, noted for administration, cultural excha…

Adams–Onís Treaty (Transcontinental or Florida Purchase Treaty) Adams–Onís Treaty 1819 agreement between the United States and Spain that ceded Florida to the U.S. and fixed a boundary between U.S. territory and Spanish North America, shaping later western borde…

Marcus Aemilius Aemilianus (Aemilian) — Roman emperor, 253 AD Aemilianus Roman soldier and short-lived emperor in 253 AD. Proclaimed by his troops after victories on the Danube frontier, he reigned about eighty-eight days before being killed during the…

Africa (Roman province) Africa Province Roman province formed after Rome defeated Carthage, covering modern northern Tunisia, parts of Algeria and Libya. A prosperous grain- and olive-producing region, later known as Ifr…

African Americans in the American Civil War Survey of the roles, numbers, military service, legal changes, and legacy of African Americans during the U.S. Civil War and its immediate aftermath.

Afsharid dynasty Iranian dynasty of Turkmen Afshar origin (18th century), founded by Nader Shah; noted for military campaigns across the Middle East and India, short-lived centralization, and a las…

Age of Discovery: European maritime expansion and global contact Age of Discovery Period from the early 15th to early 17th century when European seafaring expanded globally, seeking new trade routes, resources and knowledge; it reshaped world trade, mapping and…

Agricultural revolution: major transitions in farming and food production Agricultural revolution A survey of major agricultural revolutions — from the Neolithic shift to settled farming to the 20th‑century Green Revolution — their innovations, social effects, and environmental…

Akkad and the Akkadian Empire Akkad Akkad (Agade) was the central city and namesake of the Akkadian Empire, an early Mesopotamian polity that shaped language, administration, and imperial precedent in the 3rd millenn…

Al-Andalus: Muslim Iberia and its cultural legacy Al-Andalus Al-Andalus refers to the parts of the Iberian Peninsula governed by Muslim rulers from 711 to 1492, noted for its flourishing cities, scholarship, architecture, and complex multicu…

Alamanni (Alemanni) — West Germanic peoples of Alemannia Alamanni The Alamanni were a confederation of West Germanic tribes along the Upper Rhine. From late-Roman-era conflicts to medieval incorporation into the Frankish realm, they left linguist…

Alaska Purchase: 1867 transfer of Russian North American territory to the United States Alaska Purchase The 1867 Alaska Purchase transferred Russia's North American possession to the United States for $7.2 million — a diplomatic deal with lasting economic, strategic, and cultural con…

Albigensian Crusade (1209–1229): Causes, Campaigns, and Consequences Albigensian Crusade A 20-year military and religious campaign launched to suppress Catharism in Languedoc; transformed southern French politics, reduced the Cathar movement, and expanded royal authori…

Alderney concentration camps (Nazi occupation of the Channel Islands) Alderney camps Four Nazi-built camps on the island of Alderney (1942–1944) used for forced labour and military construction during the World War II occupation of the Channel Islands.

Alexander the Great Macedonian king and military commander who created a vast Eurasian empire in the 4th century BC; his conquests spread Greek culture and shaped the Hellenistic world.

Alexios I Komnenos: Byzantine Emperor and Architect of the Komnenian Recovery Alexios I Komnenos Alexios I Komnenos (1048–1118) restored Byzantine stability after crises of the 11th century, repelled invasions, reformed finances and military, and shaped relations with the Firs…

Algerian War (1954–1962): struggle for independence and its consequences Algerian War A concise, balanced account of the Algerian War (1954–1962): causes, conduct, major events, political outcomes, social impacts, and the long legacy in Algeria and France.

Allied-occupied Germany (1945–1949): zones, administration and legacy Allied-occupied Germany Overview of the four-zone occupation of Germany after World War II, its administration, main policies, boundary issues and how occupation led to the division of Germany and the ori…

Allied Powers of World War II Allies of World War II The Allied Powers were the international coalition that opposed the Axis in World War II, led by the United Kingdom, United States and the Soviet Union and later formalized as the…

Almohad Caliphate — Berber reform movement and medieval West African–Iberian dynasty Almohad The Almohads (al-Muwahhidun) were a 12th–13th century Berber Muslim reform movement and dynasty that unified large parts of North Africa and Muslim Iberia and left a lasting archit…

Almoravid dynasty: origins, expansion, society and legacy Almoravid dynasty Berber Muslim dynasty from the Sahara that united much of northwest Africa and parts of Iberia in the 11th–12th centuries, known for religious reform, military conquests, and found…

Alsace–Lorraine: the Imperial Territory between France and Germany Alsace–Lorraine Overview of the Imperial Territory of Alsace–Lorraine: its creation in 1871, changing administrations, cultural mix, legal distinctiveness, and return to France after 1918 and 1945…

Amarna period: Akhenaten, Atenism, and the artistic and religious revolution in Ancient Egypt Amarna period Late Eighteenth Dynasty era centered on Akhetaten (Amarna), noted for Akhenaten's religious reforms to the Aten, distinctive art and architecture, the Amarna letters, and a brief u…

American Civil War (1861–1865) American Civil War A concise overview of the American Civil War: origins, major events, combatants, and consequences including emancipation and Reconstruction.

American imperialism: history, scope, and global effects American imperialism An overview of American imperialism covering its origins, defining features, key episodes from the late 19th century, and lasting economic, military, and cultural influence.

American Occupation Zone in Germany (1945–1949) American occupation zone The sector of Germany administered by the United States after World War II, its goals, structure, challenges and legacy during the transition to the Federal Republic of Germany.

American Old West (The Wild West) American Old West An overview of the American Old West: the people, places and events of the western United States in the late 19th century, and how frontier life shaped economy, conflict and popula…

American Revolutionary War (1775–1783): Origins, Campaigns, and Legacy American Revolutionary War Armed conflict in which Britain's thirteen North American colonies fought for independence, aided by foreign allies; resulted in the creation of the United States and wide politica…

An'ei: Japanese era name (1772–1781) during the mid-Edo period An'ei An'ei (安永) was a Japanese era name from November 1772 to March 1781. This article explains its meaning, historical context under the Tokugawa shogunate, the imperial succession, an…

Anatolian hypothesis: origins and debate over Proto-Indo-European dispersal Anatolian hypothesis The Anatolian hypothesis proposes that Proto-Indo-European languages spread from Neolithic Anatolia with farming, contrasting with steppe-centred models. Overview, evidence, critic…

Ancient China: Civilization, History and Lasting Influence Ancient China An overview of Ancient China covering origins, major dynasties, culture, institutions and enduring influence from Neolithic communities to the imperial era.

Ancient Egypt (Kemet): Civilization of the Nile Ancient Egypt Overview of Ancient Egypt (Kemet): geography, society, religion, writing, monuments, historical periods, economy and the legacy revealed by archaeology and modern scholarship.

Ancient Greek Ancient Greek was the language of classical and Hellenistic Greece, spanning several dialects from the Bronze Age to the early Roman era; it shaped Western literature, philosophy,…

Ancient history — recorded civilizations from the first writing to the early Middle Ages Ancient history Overview of ancient history from the first written records to the early Middle Ages, examining how texts documented laws, religion, economy and politics across early civilizations.

Ancient Rome: history, institutions, culture and legacy Ancient Rome A concise, structured account of Ancient Rome: its origins, political development from Kingdom to Republic to Empire, major achievements in law, engineering and language, and its l…

Angen (Japanese era, 1175–1177) Angen Angen (安元) was a Japanese era name lasting from July 1175 to August 1177, coinciding with Emperor Takakura's reign in the late Heian period.

Angevin: People of Anjou and the dynasties they produced Angevin Angevin denotes people from Anjou or Angers and the medieval dynasties that originated there, notably the Plantagenet and Capetian Anjou lines, whose rule shaped territories across…

Angevin Empire (12th–13th century Plantagenet domains) Angevin Empire Dominions of the Plantagenet rulers from Anjou that stretched from the Pyrenees to Ireland in the 12th–early 13th centuries, notable for its composite structure and influence on An…

Angles (Germanic tribe behind early English identity) Angles The Angles were a Germanic people from the Angeln region who migrated to Britain in the 5th–6th centuries. Their settlements and language helped form Anglo-Saxon England and gave r…

Anglo–Dutch Wars (17th–18th centuries) Anglo-Dutch Wars A series of naval wars between the Dutch Republic and England/Great Britain over trade, maritime dominance, colonies and naval tactics that shaped early modern shipping and empire.

Anglo-Egyptian Sudan (1899–1956): Condominium, administration and legacy Anglo-Egyptian Sudan Anglo-Egyptian Sudan was a condominium administered in name by Egypt and Britain from 1899 until Sudanese independence in 1956. This article summarizes its formation, governance, e…

Anglo-Norman: the medieval ruling culture of England after 1066 Anglo-Norman Anglo-Norman refers to the mixed Norman–English ruling class, language and culture that developed in England after the 1066 conquest, shaping law, administration, architecture and…

Anglo-Saxon England: society, kingdoms, and legacy (5th–11th centuries) Anglo-Saxon England History of England from the end of Roman rule to the Norman conquest (5th–11th c.), covering settlement, kingdoms, culture, Viking impact and the formation of an English identity.