History

Pschent: The Double Crown (sekhemti) of Ancient Egypt Pschent The Pschent, or sekhemti, is the merged white and red crown worn by Egyptian rulers to signify sovereignty over Upper and Lower Egypt; its form and meaning are known from art, titu…

Punic Wars (264–146 BC) Punic Wars Three wars between Rome and Carthage for control of the western Mediterranean. Major battles, Hannibal's campaign, and Carthage's destruction shaped Rome's rise to dominance.

Qajar dynasty Iranian royal house of Turkic origin that governed Persia from the late 18th century to 1925, notable for centralizing rule in Tehran, territorial losses to Russia, cultural patron…

Qin dynasty (221–207 BC) — first imperial dynasty of China Qin dynasty Short-lived dynasty that unified the Chinese states under Qin Shihuang (221–207 BC), introduced legalist administration, standardized writing and measures, built major works and sh…

Qing dynasty (1644–1912) Qing dynasty Last imperial dynasty of China, established by the Manchu Aisin Gioro clan; it expanded and governed a multiethnic empire from 1644 until the 1911–12 revolution that led to the Rep…

United States quarter (quarter dollar coin) Quarter (United States coin) The U.S. quarter is a 25-cent coin first issued in 1796. This article explains its design, composition changes, major series, circulation role, and appeal to collectors.

Quattrocento: The Early Renaissance in Fifteenth‑Century Italy Quattrocento Quattrocento denotes the 1400s in Italy and describes the early Renaissance era of artistic innovation, humanist thought, advances in perspective and naturalism, and the rise of no…

Queen Anne's Revenge — Blackbeard's flagship Queen Anne's Revenge The flagship of the pirate Blackbeard, Queen Anne's Revenge was a former French merchant/slave vessel captured in the early 18th century and lost off the North Carolina coast; its…

Radcliffe Line The Radcliffe Line was the 1947 boundary drawn to separate British India into India and Pakistan. It shaped Punjab and Bengal, triggered mass migration and violence, and remains ce…

Rashidun Empire (Rashidun Caliphate) Rashidun Empire The Rashidun Empire (632–661) was the first caliphate led by the four 'Rightly Guided' caliphs. It oversaw rapid territorial expansion, administrative change, and events that shape…

Ravensbrück concentration camp: history, structure, and legacy Ravensbrück concentration camp Ravensbrück was the main Nazi concentration camp for women, established in 1939 in northern Germany. This article summarizes its organization, prisoner population, abuses, liberati…

Reagan Era: United States politics and policy, 1981–1989 Reagan Era Period of U.S. history defined by Ronald Reagan's presidency (1981–1989), marked by conservative economic policies, a hard line in the Cold War, judicial appointments, and long-ter…

Reception history of Jane Austen: emergence, scholarship, and popular culture Reception history of Jane Austen A concise history of how Jane Austen’s novels moved from modest, anonymous publication to central works of literary study and mass popular culture, including scholarly debate and a…

Reconquista (Iberian Christian reconquest, c. 8th–15th centuries) Reconquista The Reconquista was the long process on the Iberian Peninsula by which Christian kingdoms gradually reclaimed territory from Muslim-ruled al-Andalus, ending with Granada's fall in…

Reconstruction era (United States, 1865–1877) Reconstruction era Period after the American Civil War when the federal government sought to rebuild the Southern states, integrate formerly enslaved people into civic life, and resolve questions of…

Red River Rebellion (1869–1870): Métis resistance and the creation of Manitoba Red River Rebellion An 1869–70 Métis uprising in Rupert's Land that produced a provisional government under Louis Riel, prompted the Manitoba Act and highlighted disputes over land, language, religion…

Regency era (United Kingdom, 1811–1820) Regency era British period when the future George IV served as Prince Regent (1811–1820), noted for distinctive fashion, Romantic literature, urban transformation, the end of the Napoleonic Wa…

Regnal year A regnal year counts the years of a sovereign's reign from accession. Used historically for dating documents, coins and laws, it starts at accession and is expressed as an ordinal…

Regnenses (Regni): ancient tribe of southern Britain Regnenses The Regnenses (or Regni) were a Celtic people based around modern Chichester in southern England; they became a civitas under Roman rule and are known chiefly from archaeology and…

Reign of Terror (French Revolution) Reign of Terror A concentrated period of political repression and executions during the French Revolution (1793–1794), led by revolutionary leaders and institutions to suppress perceived enemies o…

Reiki (era): Japanese nengō from 715 to 717 Reiki (era) Reiki (霊亀) was a short Japanese era name (nengō) from September 715 to November 717 during the early Nara period, associated with Empress Genshō and used to date official records a…

Reiwa period Reiwa is the current Japanese era that began on 1 May 2019 with Emperor Naruhito's accession; its name and use shape modern Japanese calendars, documents, and cultural reference.

Renaissance: European cultural rebirth from the late Middle Ages to the early modern era Renaissance The Renaissance was a broad European cultural movement, originating in Italy, that revived classical learning and transformed art, science, literature and society between the late…

Republic of China (1912–1949) State on the Chinese mainland from the 1912 Xinhai Revolution to 1949; marked by revolutionary origins, a fragmented warlord era, Nationalist rule, war with Japan, and civil war.

Republic of Mahabad: short‑lived Kurdish state in northwestern Iran (1946–1947) Republic of Mahabad An expanded encyclopedia entry on the Republic of Mahabad: its formation in 1946, leadership, Soviet context, collapse, and legacy for Kurdish politics and regional history.

Republic of Venice (Serenissima) — maritime state of medieval and early modern Italy Republic of Venice Mediterranean maritime republic centered on Venice (7th–18th centuries), noted for trade, shipbuilding, unique oligarchic government, artistic legacy, and eventual fall to Napoleon…

Restauration (Bourbon Restoration in France) Restauration Period after Napoleon's fall when the Bourbon monarchy was restored in France (1814–1830), combining a constitutional charter with conservative politics and continuing social and l…

Richard Hildreth (1807–1865) — American journalist and historian Richard Hildreth American journalist, author and historian best known for his six-volume History of the United States of America (published 1849–1853); a significant mid-19th century figure in Amer…

Rikkokushi — The Six National Histories of Japan Rikkokushi Rikkokushi (六国史) are six official, state-sponsored chronicles compiled in classical Chinese that record Japan's mythic origins and historical events from ancient times through the…

RMS Empress of Ireland Canadian Pacific ocean liner that sank after colliding with the Norwegian collier SS Storstad on 29 May 1914 in the Saint Lawrence River; 1,012 of 1,477 aboard perished and the wre…

Roman Britain (Britannia) — Roman province in Great Britain Roman Britain Roman Britain was the part of the island of Great Britain governed by the Roman Empire from about AD 43 to c. 410. It developed towns, roads, forts and left a rich archaeological l…

Roman Empire: origins, government, territories, decline and legacy Roman Empire Overview of the Roman Empire: origins under Augustus, imperial institutions, major provinces and languages, factors in decline, and enduring cultural, legal, and architectural lega…

Roman influence in Caucasian Albania How Rome and later Byzantium shaped political ties, religion, and culture in Caucasian Albania (parts of modern Azerbaijan and Dagestan) from the late Hellenistic era through the e…

Italia — Roman Italy: the peninsula that was Rome's heartland Roman Italy Italia was the Italian peninsula and the political, cultural, and economic core of Rome from the Republic through the Empire; its special legal status and infrastructure underpinne…

Roman Kingdom: origins, institutions, and legacy Roman Kingdom An overview of the Roman Kingdom (Regnum Romanum): its traditional origins, political and religious institutions, the list of early kings, and its transformation into the Roman Rep…

Roman Republic: institutions, expansion, crisis, and legacy Roman Republic Comprehensive overview of the Roman Republic: origins, constitution, social conflicts, military expansion, the crises of the late Republic, and its enduring legal and political leg…

Roman Wales: conquest, administration and legacy Roman Wales Survey of Roman rule in the area of modern Wales: geography and tribes, military conquest and forts, towns and economy (mining and roads), cultural impact and long-term legacy.

Romania in World War II An overview of Romania's shifting alliances, major military campaigns, domestic politics, the Holocaust, and the 1944 coup that changed its course in World War II.

Romanian War of Independence (1877–1878) Romanian War of Independence The 1877–1878 conflict in which the United Principalities of Romania fought alongside Russia against the Ottoman Empire, resulting in Romania's de facto independence and recognitio…

Rouran Khaganate — early steppe confederation of northern China Rouran A steppe confederation that dominated parts of northern China in the 4th–6th centuries, known for early use of the titles khan/khagan and for its debated linguistic and ethnic orig…

Royal house (royal dynasty) Royal house A royal house or dynasty is a family lineage that supplies monarchs and titled members; it involves names, titles, succession practices and historical roles that vary across region…

Royal Proclamation of 1763: British policy on settlement and Indigenous lands Royal Proclamation of 1763 A 1763 royal order by King George III that regulated settlement, land purchases, and relations with Indigenous peoples after the Seven Years' War; it shaped colonial tensions and l…

Ruanda-Urundi: history and legacy of a colonial territory Ruanda-Urundi Ruanda-Urundi was a central African territory administered by colonial powers in the 20th century, later becoming the separate nations of Rwanda and Burundi following decolonizatio…

Rupert's Land: history, extent and legacy Rupert's Land Rupert's Land was a vast chartered territory under the Hudson's Bay Company from 1670. This article summarizes its origins, geography, Indigenous and Métis connections, transfer to…

Russian Armenia: Eastern Armenia under the Russian Empire, 1828–1918 Russian Armenia Period when Eastern Armenia was governed by the Russian Empire (from the 1828 Treaty of Turkmenchay until the collapse of imperial authority in 1917–1918) and its social, political…

Russian Empire (1721–1917): history, structure, and legacy Russian Empire Transcontinental monarchy that existed from 1721 to 1917. An autocratic, multiethnic state centered in Russia that expanded across Eurasia, modernized unevenly, and ended with the…

Russian Revolution: collapse of the Tsarist regime and rise of the Soviet state Russian Revolution The Russian Revolution (1905–1917) was a sequence of political upheavals that ended imperial rule, brought the Bolsheviks to power in 1917, and led to the creation of the Soviet Un…

Russo‑Georgian War (August 2008) — South Ossetia and Abkhazia conflict Russo-Georgian War Concise encyclopedia entry on the August 2008 Russo‑Georgian War: origins, combatants, timeline, humanitarian impact, international response, legal cases and longer‑term regional e…