By June 1920, the Polish armies were past Vilnius, Minsk and ( allied with the Directorate of Ukraine ) reached Kiev, but then the massive Bolshevik counteroffensive moved the Poles out of most of Ukraine and on the northern front arrived at the outskirts of Warsaw.

* 1920 – Polish-Soviet War: The Polish army under General Edward Rydz-Śmigły celebrates its capture of Kiev with a victory parade on Khreschatyk.

* 1920 – Kiev Offensive: Polish troops led by Józef Piłsudski and Edward Rydz-Śmigły and assisted by a symbolic Ukrainian force capture Kiev only to be driven out by the Red Army counter-offensive a month later.

* Dnevniki 1917-1921: oktyabr 1917-yanvar 1920 ( Diaries 1917-1921 ), Kiev, Naukova dumka, 1994, ISBN 5-12-004641-X, 269 pp.

Poland's Józef Piłsudski, who envisioned the formation of an Intermarum Federation as a Central and East European bloc that would be a bulwark against Germany to the west and Russia to the east, carried out a Kiev Offensive into Ukraine in 1920.

After early setbacks against Poland in 1919, the Red Army was overwhelmingly successful in a counter-offensive in early 1920 that nullified the Polish Kiev Operation, forcing a Polish retreat.

In 1920, during the brief takeover of Kiev by the Polish army, Timoshenko travelled to Kiev, reunited with his family and returned with his family to Zagreb.

Piłsudski first carried out a major military thrust into Ukraine in 1920 and in May Polish-Ukrainian forces reached Kiev.

Polish forces pushed eastward, taking Kiev in May 1920.

The Encyclopædia Britannica begins its article with the date range 1919 – 1920 but then states, " Although there had been hostilities between the two countries during 1919, the conflict began when the Polish head of state Józef Pilsudski formed an alliance with the Ukrainian nationalist leader Symon Petlyura ( 21 April 1920 ) and their combined forces began to overrun Ukraine, occupying Kiev on 7 May.

As the war progressed, particularly around the time the Polish Kiev Offensive of 1920 had been repelled, the Soviet leaders, including Lenin, increasingly saw the war as the real opportunity to spread the revolution westwards.

He left Kiev in 1920 to study in Rome where he became a disciple of the Italian school of algebraic geometry, studying with Guido Castelnuovo, Federigo Enriques and Francesco Severi.

Symon Petliura and General Listowski during the Kiev Offensive ( 1920 ) | Kiev Offensive Józef Piłsudski and Symon Petliura Kiev, May 1920

Polish forces, reinforced by Petliura's remaining troops ( some two divisions ), attacked Kiev on May 7, 1920 in what became a turning point of the 1919 – 21 Polish-Bolshevik war.

In 1920 Ehrenburg went to Kiev where he experienced four different regimes in the course of one year: the Germans, the Cossacks, the Bolsheviks, and the White Army.

Polish-Soviet War in 1920 | 1920 theater of war: farthest advances of Second Polish Republic | Polish and Ukrainian People's Republic Directorate of Ukraine | Directorate forces during the Kiev Offensive ( 1920 ) | Kiev Offensive

After dealing with the common offensive of the Directorate and Polish forces — the Kiev Offensive ( see Polish-Soviet War in 1920 )—, Rakovsky's government took measures regarding collectivization ; according to his biographer Gus Fagan, he became himself a proponent of greater Ukrainian autonomy, and advocated both Ukrainization through the complete integration of Borotbists into Party structures and a slower pace in communization.

On 11 November 1920, he was awarded the Navy Cross for his planning of the attack and capture of Mont Blanc, and in the Meuse-Argonne Offensive.

It took place May 29 – 31, 1920, near the Ukrainian village of Volodarka, in the course of the Polish Offensive on Kiev during the Polish-Soviet War.

On April 21, 1920, Józef Piłsudski and Symon Petliura signed an alliance, in which Poland promised the Ukrainian People's Republic the military help in the Kiev Offensive against the Red Army in exchange for the acceptance of Polish-Ukrainian border on the river Zbruch.

The Kościuszko Squadron was first used in the Kiev Offensive in April 1920, rebasing from Lwów to Połonne.

In April 1920 Poland launched the large-scale Kiev Offensive in hopes to capture Ukraine.

** Juan José Torres, former President of Bolivia ( assassinated in the frame of Operation Condor ) ( b. 1920 )

The attack, which initially had the approval of the Haganah ( the principal Jewish paramilitary group in Palestine ) and was conceived of as a response to Operation Agatha ( in which widespread raids, including one on the Jewish Agency, had been carried out ), was the deadliest directed at the British during the Mandate era ( 1920 – 1948 ).

He went on to serve in the " Operation Khodad Khel " in 1921, and in the Waziristan war in 1920.

During the Polish-Soviet War of 1920 the town was captured by the Polish Army in the so-called Mozyr Operation.

* Adrian Heath ( painter ) ( 1920 – 1992 ), British painter

* Alexander of Greece ( 1917 – 1920 ), king of Greece

* Alexander I of Greece ( 1917 – 1920 ), King of Greece

* Nadir Afonso ( born 1920 ), Portuguese painter.

In addition to Triumphant Democracy ( 1886 ), and The Gospel of Wealth ( 1889 ), he also wrote An American Four-in-hand in Britain ( 1883 ), Round the World ( 1884 ), The Empire of Business ( 1902 ), The Secret of Business is the Management of Men ( 1903 ), James Watt ( 1905 ) in the Famous Scots Series, Problems of Today ( 1907 ), and his posthumously published autobiography Autobiography of Andrew Carnegie ( 1920 ).

Aristide Maillol, The Night, ( 1920 ), Stuttgart

Three of his bronzes grace the grand staircase of the Metropolitan Opera House in New York City: Summer ( 1910 – 11 ), Venus Without Arms ( 1920 ), and Kneeling Woman: Monument to Debussy ( 1950 – 55 ).

Though Hitler was originally against the idea ( but later convinced ), Drexler changed the name of the party to the National Socialist German Workers ' Party ( Nationalsozialistische Deutsche Arbeiterpartei or NSDAP ) early in 1920.

* ABC ( 1920 automobile ), an English car

James Avery Hopwood ( May 28, 1882-July 1, 1928 ), was the most successful playwright of the Jazz Age, having four plays running simultaneously on Broadway in 1920.

His many plays included Nobody's Widow ( 1910 ), starring Blanche Bates ; Fair and Warmer ( 1915 ), starring Madge Kennedy ( filmed in 1919 ); The Gold Diggers ( 1919 ), starring Ina Claire ( filmed in 1923 as The Gold Diggers, in 1928 as Gold Diggers of Broadway and also as Gold Diggers of 1933 ); Ladies ' Night, 1920, starring Charlie Ruggles ( filmed in 1928 ); the famous mystery play The Bat ( with Mary Roberts Rinehart ), 1920 ( filmed in 1926, 1930 and 1959 ); Getting Gertie's Garter ( with Wilson Collison ), 1921, starring Hazel Dawn ( filmed in 1927 and 1945 ); The Demi-Virgin, 1921, also starring Hazel Dawn ; The Alarm Clock, 1923 ; The Best People ( with David Gray ), 1924 ( filmed in 1925 and as Fast and Loose in 1930 ), the song-farce Naughty Cinderella, 1925, starring Irene Bordoni and The Garden of Eden in 1927 ( filmed in as 1928 ).

Also, the system of symbols has changed a number of times both since it was introduced in 1907 and since the modern system was instituted in 1920, so ships ' symbols sometimes change without anything being done to the physical ship.

During the 1920 Jerusalem riots, the 1921 Palestine riots and the 1929 Palestine riots, Palestinian Arabs manifested hostility against Zionist immigration and Jewish communities, which provoked the reaction of Jewish militias, sometimes supported by British troops.

The western range, the second major region, is the Lebanon Mountains, sometimes called Mount Lebanon, or Lebanon proper before 1920.

The term may be used broadly to include professional black teams outside the leagues and it may be used narrowly for the seven relatively successful leagues beginning in 1920 that are sometimes termed " Negro Major Leagues ".

Eatough's ( sometimes Etough's ) was a shoemaking firm from Leicestershire which opened a factory in Burton Road, Branston in 1920.

The Group of Seven — sometimes known as the Algonquin school — were a group of Canadian landscape painters from 1920 to 1933, originally consisting of Franklin Carmichael ( 1890 – 1945 ), Lawren Harris ( 1885 – 1970 ), A. Y. Jackson ( 1882 – 1972 ), Frank Johnston ( 1888 – 1949 ), Arthur Lismer ( 1885 – 1969 ), J. E. H. MacDonald ( 1873 – 1932 ), and Frederick Varley ( 1881 – 1969 ).

One account holds that Reuben Kulakofsky ( sometimes spelled Reubin, or the last name shortened to Kay ), a Lithuanian-born grocer from Omaha, Nebraska, was the inventor, perhaps as part of a group effort by members of Kulakofsky's weekly poker game held in the Blackstone Hotel from around 1920 through 1935.

Henrietta Lacks ( August 1, 1920 – October 4, 1951 ) ( sometimes erroneously called Henrietta Lakes, Helen Lane or Helen Larson ) was an African-American woman who was the unwitting source of cells ( from her cancerous tumor ) which were cultured by George Otto Gey to create an immortal cell line for medical research.

The Far Eastern Republic (), sometimes called the Chita Republic, was a nominally independent state that existed from April 1920 to November 1922 in the easternmost part of the Russian Far East.

By around 1920, most of the artwork and decoration had migrated from the binding to the dust jacket, and jackets were routinely printed with multiple colors, extensive advertising and blurbs ; even the underside of the jacket was now sometimes used for advertising.

Cornelis Johannes van Houten ( 1920 – August 24, 2002 ) was a Dutch astronomer, sometimes referred to as Kees van Houten.

Shaikh Mohammad Khiābāni ( sometimes spelled Khiyabani ), also known as Shaikh Mohammad Khiābāni Tabrizi ( 1880 – 1920 ), was an Iranian cleric, political leader, and representative to the parliament.

* Some dialects of the Karelian language spoken within the former borders ( 1920 peace ) are sometimes classified as " border Karelian dialects " ( Raja-Karjalan murteet ).

Later novels and stories, like L ' Autre Vue ( 1904 ) and Les Libertins d ' Anvers (= Antwerp libertines, 1912 ) also contain notions of homosexuality or sometimes only hints of admiration for masculinity, e. g. Dernières Kermesses ( 1920 ).

The Far Eastern Republic, sometimes called the Chita Republic, existed from April 1920 to November 1922 in the easternmost part of Siberia.

From roughly 1875 to 1920, they were extended to make 80-foot gaff ketches, sometimes by the cut-and-shut procedure.

A second, much more severe recession, sometimes labeled a depression, began in January 1920.

Joy St Clair Hester ( 21 August 1920 — 4 December 1960 ) was an Australian artist who played an important, though sometimes underrated, role in the development of Australian modernism, though her works could also be considered Abstract Expressionism.

On August 10, 1920, Russian Cossack units under the command of Gay Dimitrievich Gay ( sometimes called by Poles Gaj-Chan ( pronounced " Guy Khan ")) crossed the Vistula River, planning to take Warsaw from the west, that is from the direction opposite to that of the attacking main Soviet forces.

William Scott " Jack " Elam ( November 13, 1920 – October 20, 2003 ) was an American film actor best known for his numerous roles as villains in Western films and, later in his career, comedies ( sometimes spoofing his villainous image ).

John Hidalgo Moya ( May 5, 1920 – 1994 ), sometimes known as Jacko Moya, was an American-born architect who worked largely in England.

* Battle of the Niemen River of 1920, sometimes referred to as the Second Battle of Grodno

She escaped from her dominant and sometimes violent father by marrying a Jewish confectionery manufacturer in 1920.

Edward Payson Ripley ( October 30, 1845 – February 4, 1920 ), sometimes referred to as Edward P. Ripley or E. P. Ripley, was the fourteenth president of the Atchison, Topeka and Santa Fe Railway.