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- Racism against Native Americans in the United StatesBoth during and after the colonial era in American history, white settlers engaged in prol
- Racism in JapanRacism in Japan (人種主義, jinshushugi) comprises negative attitudes and views on race or ethn
- Radom GhettoThe Radom Ghetto was a Nazi ghetto set up in March 1941 in the city of Radom during the Na
- Ragamuffin War1835–45 Republican uprising in southern Brazil
- Raid on GenoaThe Raid on Genoa was a minor naval engagement fought in the harbour of the Italian city o
- Raid on PaombongThe Raid on Paombong was organized and executed on September 3, 1897, between the Philippi
- Rail transport in ChinaRail transport is an important mode of long-distance transportation in China. As of 2024,
- Ranks and insignia of the Luftwaffe (1935–1945)The Luftwaffe, from its founding in 1933 to the end of World War II in 1945, used ranks si
- RassenschandeNazi word for interracial contacts
- RatniksFar-right Bulgarian nationalist organization
- Rebel Faction (Cultural Revolution)Chinese Red Guards faction
- Rebellion of Túpac Amaru II1780–83 uprising in Spanish-ruled Peru
- Rebellions of 1837–1838Canadian reformers' rebellion against the British Canadian government
- Reconstruction AmendmentsPost-Civil War amendments to the United States Constitution
- Reconstruction eraPeriod after American Civil War (1865–1877)
- Red ArmySoviet army and air force from 1918 to 1946
- Red AugustSeries of massacres in Beijing during August 1966; part of the Cultural Revolution
- Red flag (politics)Symbol of socialism and left-wing politics
- Red Guards1966–1968 social movement in China
- Red Guards (Russia)Russian volunteer paramilitary units
- Red Hill water crisisThe Red Hill water crisis is a public health crisis and environmental disaster caused by f
- Red NapoleonNickname for several communist generals
- Red Orchestra (espionage)World War II anti-Nazi resistance movement
- Red River Expedition (1806)The Red River Expedition, also known as the Freeman–Custis Expedition, Freeman Red River E
- Red ScareAny of several events in which widespread fear of communism or leftism develops
- Red Terror (Spain)Assassinations during the Spanish Civil War
- Red triangle (badge)Symbol of anti-fascism
- Red Turban Rebellion (1854–1856)The Red Turban Rebellion of 1854–1856 was a rebellion by members of the Tiandihui (Chinese
- Red-baitingMethod of discrediting opponent's argument
- Redshirts (Italy)Military followers of Giuseppe Garibaldi
- Reform and opening upEconomic reforms in China since 1978
- Reform bureaucratsJapanese WWII technofascist civilian faction
- Reform WarCivil war within Mexico from 1858 to 1861
- Reformed Government of the Republic of ChinaPuppet government controlled by Japan
- Refugee wave from the People's Republic of China to British Hong Kong20th-century migration event
- Regency period (Empire of Brazil)1831–1840 regency for Pedro II
- Rehabilitation (Soviet)Post-1953 Soviet exoneration of victims of repression
- Reichsführer-SSGerman Nazi paramilitary commander rank
- ReichskommissariatTerritories of Nazi Germany during WWII
- ReichsmarkCurrency of Germany from 1924 to 1945
- Reichsrat (Germany)German legislative body 1919–1934
- Reichstag Bloodbath1920 riots against passage of the Works Councils Act in Berlin, Germany
- Reichstag buildingSeat of the federal parliament of Germany
- Reichstag fire1933 arson attack in Berlin, Germany
- Reichstag Fire Decree1933 emergency decree in Nazi Germany suspending civil liberties
- ReichswehrCombined military forces of Germany 1921–1935
- Reinhard ScheerCarl Friedrich Heinrich Reinhard Scheer (30 September 1863 – 26 November 1928) was an Admi
- Reinsurance TreatyLate 19th-century German-Russian agreement
- RejectionistsThe Rejectionists are an insurgent group operating within Iraq as of 2009. As defined by t
- Religion in the Soviet UnionReligion in the Union of Soviet Socialist Republics (USSR) was dominated by the fact that
- Religious (Western Christianity)Member of a religious order
- Religious communismForm of communism that incorporates religious principles
- Religious views of Abraham LincolnAbraham Lincoln grew up in a highly religious Baptist family. He never joined any Church,
- Religious views of Thomas JeffersonThe religious views of Thomas Jefferson diverged widely from the traditional Christianity
- Remilitarisation of the Rhineland1936 treaty violation by Nazi Germany
- René BousquetRené Bousquet (French: ; 11 May 1909 – 8 June 1993) was a high-ranking French political ap
- René IchéRené Iché (21 January 1897 – 23 December 1954) was a 20th-century French sculptor.
- René LaverdureLieutenant-Colonel René Philippe Laverdure (27 January 1862 – 13 November 1914) was a Fren
- RentenmarkGerman currency from 1923 to 1924
- Reparation CommissionBody established by the Treaty of Versailles
- Report on an Investigation of the Peasant Movement in Hunan1927 essay by Mao Zedong
- Representation of the People (Equal Franchise) Act 1928Act of the Parliament of the United Kingdom reforming the electoral system
- Repression of science in the Soviet UnionSciences and research that were banned by the Soviet Union
- Republic of CanadaThe Republic of Canada was a government proclaimed by William Lyon Mackenzie on December 5
- Republic of China (1912–1949)Mainland period of the Republic of China
- Republic of China ArmyGround branch of Taiwan's military
- Republic of China nationalismState nationalism in the Chinese-speaking world
- Republic of Cuba (1902–1959)Historical period in Cuba from 1902 to 1959
- Republic of Ezo1869 short-lived state on Hokkaido
- Republic of German-AustriaDe facto state in central Europe, 1918–1919
- Republic of Haiti (1859–1957)Period between the Second Empire and the Duvalier family
- Republic of TexasCountry in North America (1836–1846)
- Republic of Zamboanga1899–1903 polity in Zamboanga, Philippines
- Republican faction (Spanish Civil War)Side in the Spanish Civil War that supported the Second Spanish Republic
- Republicanism in SpainPolitical position and movement
- Republikanischer SchutzbundThe Republikanischer Schutzbund (German: , "Republican Protection League") was an Austrian
- Rescue of Jews during the HolocaustHelp offered to Jews to escape the Holocaust
- Resistance during World War IIIrregular forces in World War II
- Resolution of the Dreyfus affairThe resolution of the Dreyfus affair began with the decision of the Court of Cassation to
- Restoration (Spain)Period in the history of Spain, 1874–1931
- Restoration and Regeneration in SwitzerlandSwiss history from 1814 to 1847
- Retour des cendresReturn of Napoleon's mortal remains
- Retreat of the government of the Republic of China to Taiwan1949 event in the Chinese Civil War
- Retreat to Lake AshengeThe Battle of Lake Ashenge, also called the Retreat of Lake Ashenge, was a skirmish that o
- Retrocession DayAnniversary day commemorating the end of Japanese rule over Taiwan on 25 October 1945
- Reverse CourseShift in United States–Japan relations during the Allied occupation
- Revolt of the Czechoslovak Legion1918–1920 Russian Civil War campaign
- Revolt of the PolkosThe Revolt of the Polkos was a coup d'état in Mexico that was launched on February 27, 184
- Revolution of 1904The Revolution of 1904 was a civic-military revolt led by Aparicio Saravia against the gov
- Revolution of 1930Armed insurrection which ended the First Brazilian Republic
- Revolutionary waveSeries of revolutions occurring in various locations within a similar time span
- Revolutions during the 1820sRevolutions during the 1820s included revolutions in Russia (Decembrist revolt), Spain, Po
- Revolutions of 1830Series of political upheavals in Europe
- Revolutions of 1848Series of political upheavals in Europe
- Revolutions of 1848 in the Italian statesThe revolutions of 1848 in the Italian states, part of the wider revolutions of 1848 in Eu
- Revolutions of 1917–1923Revolutionary wave after World War I
- Revolutions of 1989Revolutionary wave overthrowing most communist states in Europe
- Rhine campaign of 1795In the Rhine campaign of 1795 (April 1795 to January 1796) during the War of the First Coa
- Richard Müller (socialist)Richard Müller (9 December 1880 – 11 May 1943) was a German socialist, metal worker, union
- Richard PeirseAir Chief Marshal Sir Richard Edmund Charles Peirse, KCB, DSO, AFC (30 September 1892 – 5
- Rif War1921–1926 war between Spain and Riffian tribes of Morocco
- Rise of nationalism in EuropeIn Europe, the emergence of nationalism was stimulated by the French Revolution and the Na
- Rising Sun FlagHistorical Japanese military flag
- Risorgimento!Risorgimento! is an opera in one act by Lorenzo Ferrero set to an Italian-language librett
- Rival governmentClaims to be the legitimate government of a sovereign state
- RML 7-pounder mountain gunThe Ordnance RML 7-pounder Mk IV "Steel Gun" was a British rifled muzzle-loading mountain
- Roaring Twenties1920s period of sustained economic prosperity in Western Europe and North America
- Robards–Donelson–Jackson relationship controversyAmerican social-political scandal
- Robert A. LewisRobert Alvin Lewis (October 18, 1917 – June 18, 1983) was a United States Army Air Forces
- Robert CalderAdmiral Sir Robert Calder, 1st Baronet, KCB (2 July 1745 – 31 August 1818) was a Royal Nav
- Robert Gibb (painter)56°00′00″N 2°30′50″W / 56.000°N 2.514°W
- Robert HainingGeneral Sir Robert Hadden Haining, KCB, DSO, JP (28 July 1882 – 15 September 1959) was a s
- Robert KempnerRobert Max Wasilii Kempner (17 October 1899 – 15 August 1993) was a German lawyer of Jewis
- Robert Lee BullardLieutenant General Robert Lee Bullard (January 5, 1861 – September 11, 1947) was a senior
- Robert ManserghGeneral Sir Eric Carden Robert Mansergh, GCB, KBE, MC (12 May 1900 – 8 November 1970) was
- Robert Roswell PalmerRobert Roswell Palmer (January 11, 1909 – June 11, 2002) was an American historian at Prin
- Robert William RedeRobert William Rede (13 July 1815 – 13 July 1904) was a member of Victoria's volunteer mil
- Rodrigo DutertePresident of the Philippines from 2016 to 2022
- Röhm scandal1931–32 political scandal in Germany
- Roland N. SmootRoland Nesbit Smoot (May 7, 1901 – February 13, 1984) was a highly decorated officer in th
- Romani HolocaustGenocide of the Romani in Europe during World War II
- Romania in World War IThe Kingdom of Romania remained neutral throughout the first two years of World War I. The
- Romanian anti-communist resistance movement1944–1962 armed resistance movement against communist rule in Romania
- Romanian campaign (1916)After a series of quick tactical victories on the numerically overpowered Austro-Hungarian
- Romanian landings in BulgariaThe Romanian landings in Bulgaria were a decisive military action during the Second Balkan
- Romanian military intervention in Bessarabia1918 invasion and annexation of Bessarabia by the Kingdom of Romania
- Romanian nationalismPolitical movement
- Romolo PolacchiniRomolo Polacchini (20 May 1897 – 16 October 1968) was an Italian admiral during World War
- Rose Revolution2003 popular uprising in Georgia
- Rowlatt ActGovernment act passed in 1919 by the British in India
- Roy KellockRoy Lindsay Kellock, CC (November 12, 1893 – December 12, 1975) was a Canadian Justice of
- Royal Air Force CommandosRoyal Air Force Commandos were formed from units of the Royal Air Force (RAF) during the S
- Royal Italian ArmyArmy of the Kingdom of Italy from 1861 to 1946
- Royal Lao Government in ExileGovernment in exile of Laos
- Royal Malay RegimentMilitary unit
- Royal Serbian ArmyThe Army of the Kingdom of Serbia (Serbian Cyrillic: Војска Краљевине Србије, romanized: V
- Rudolf CederströmOlof Rudolf Cederström (8 February 1764 – 1 June 1833) was a Swedish naval commander. Cede
- Rudolf von BrudermannRudolf Nikolaus Ritter von Brudermann (from 1919 Rudolf Brudermann; 9 January 1851 Gyöngyö
- Rue de la VictoireThe Rue de la Victoire is a street in the 9th arrondissement of Paris.
- Ruhr uprising1920 left-wing workers' revolt in Germany
- Rule by decreeStyle of governance
- Russian Civil WarMulti-party war in the former Russian Empire (1917–1922)
- Russian classical musicRussian classical music is a genre of classical music related to Russia's culture, people,
- Russian conquest of Central AsiaPeriod in Russian and Central Asian history
- Russian cruiser Pallada (1899)Pallada was the lead ship in the Pallada class of protected cruisers in the Imperial Russi
- Russian EmpireRussian state from 1721 to 1917
- Russian famine of 1921–1922Famine in the Russian Soviet Federative Socialist Republic
- Russian invasion of Manchuria1900 military conflict in East Asia
- Russian Provisional Government1917 provisional government
- Russian RepublicRussian state from 1917 to 1918
- Russian Revolution1917–1922 civil war in the Russian Empire
- Russian Revolution of 1905Political and social unrest in the Russian Empire
- Russian Soviet Federative Socialist RepublicSoviet republic from 1917 to 1991
- Russian Turkestan1867–1918 Governorate-General of the Russian Empire
- Russification of FinlandRussian policy of suppressing Finnish autonomy (1899–1905, 1908–17)
- Russo-American Treaty of 1824The Russo-American Treaty of 1824 (also known as the Convention of 1824) was signed in St.
- Russo-Japanese War1904–1905 conflict in East Asia
- Russo-Turkish War (1568–1570)First conflict of the Russo-Turkish wars
- Russo-Turkish War (1672–1681)Second conflict of the Russo-Turkish wars
- Russo-Turkish War (1768–1774)Sixth conflict of the Russo-Turkish wars
- Russo-Turkish War (1787–1792)Seventh conflict of the Russo-Turkish wars
- Russo-Turkish War (1806–1812)Eighth conflict of the Russo-Turkish wars
- Russo-Turkish War (1828–1829)Ninth conflict of the Russo-Turkish wars
- Russo-Turkish War (1877–1878)Eleventh and penultimate conflict of the Russo-Turkish wars
- Ruth Wilson GilmoreAmerican abolitionist and prison scholar
- Rwandan genocideMass murder campaign in Rwanda
- Ryōhei UchidaJapanese ultra-nationalist, Pan-Asianist, and martial artist
- Ryukyu DispositionJapanese annexation of the Ryukyu Kingdom