* 1920 – Polish – Soviet War: the Battle of Warsaw begins and will last till August 25.

* 1920 – Polish-Soviet War: Battle of Warsaw, which began on August 13, ends.

* 1920 – Polish-Bolshevik War: a decisive Polish victory in the Battle of Komarów.

The most intensive use of armoured trains was during the Russian Civil War ( 1918 – 1920 ).

* 1920 – The Latvian – Soviet Peace Treaty, which relinquished Russia's authority and pretenses to Latvia, is signed, ending the Latvian War of Independence.

* 1920 – World War I: Ottoman sultan Mehmed VI's representatives sign the Treaty of Sèvres that divides up the Ottoman Empire between the Allies.

Beneath the Arc is the Tomb of the Unknown Soldier from World War I. Interred here on Armistice Day 1920, it has the first eternal flame lit in Western and Eastern Europe since the Vestal Virgins ' fire was extinguished in the fourth century.

* 1920 – At the San Remo conference, the principal Allied Powers of World War I adopt a resolution to determine the allocation of Class " A " League of Nations mandates for administration of the former Ottoman-ruled lands of the Middle East.

Following World War I, the 1920 Treaty of Sèvres demilitarized the strait and made it an international territory under the control of the League of Nations.

* Bloody Sunday ( 1920 ), a day of violence in Dublin, Ireland during the Irish War of Independence

Following a Royal Commission report in 1906, work began on a new prayer book, work that was to take twenty years due in part to the demands of the Great War ( 1914 – 18 ) and in part to the constitution of the Church Assembly in 1920 which " perhaps not unnaturally wished to do the work all over again for itself.

After serving in World War I, Brown was given his first co-directing credit ( with Tourneur ) for The Great Redeemer ( 1920 ).

" They were most active between 1920 and 1922, during the period of the Irish War of Independence.

* 1920 – Following more than a month of Turkish-Armenian War, the Turkish dictated Treaty of Alexandropol is concluded.

* 1920 – Yevgeniya Rudneva, Russian World War II heroine ( d. 1944 )

Thompson's older brother William Frank Thompson ( 1920 – 1944 ), was also a member of the British Communist Party during World War Two.

The " European War " became known as " The Great War ", and it was not until 1920, in the book " The First World War 1914 – 1918 " by Charles à Court Repington, that the term " First World War " was used as the official name for the conflict.

Finland's foreign politics before this deal had been varied: independence from Imperial Russia with support of Imperial Germany in 1917 ; participation in the Russian Civil War ( without official declaration of war ) alongside the Triple Entente 1918 – 1920 ; a non-ratified alliance with Poland in 1922 ; association with the neutralist and democratic Scandinavian countries in the 1930s ended by the Winter War ( 1939 ); and finally in 1940, a rapprochement with Nazi Germany, the only power able to protect Finland against the expansionist Soviet Union, leading to the Continuation War in 1941.

The Palestine Mandate was based on the principles contained in Article 22 of the draft Covenant of the League of Nations and the San Remo Resolution of 25 April 1920 by the principal Allied and associated powers after the First World War.

The decision to build a major seaport at the Gdynia village was made by the Polish government in the winter of 1920, in the midst of the Polish-Soviet War ( 1919 – 1920 ).

From its inception in 1920 with the passage of Public Law 236, 66th Congress, the purpose of the vocational rehabilitation program has been to assist the States, by means of grants-in-aid, to return disabled men and women to productive, gainful employment.

This Association, organized in 1920, is affiliated with the Athletic Federation of College Women.

In 1920, the Lambeth Conference repeated its 1908 condemnation of contraception and issued `` an emphatic warning against the use of unnatural means for the avoidance of conception, together with the grave dangers -- physical, moral, and religious -- thereby incurred, and against the evils which the extension of such use threaten the race ''.

Along with Miss Marple, Poirot is one of Christie's most famous and long-lived characters, appearing in 33 novels, one play, and more than 50 short stories published between 1920 and 1975 and set in the same era.

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 ).

Bamford left in 1920 and the company was revitalised with funding from Count Louis Zborowski.

"' Po Boy ', scored for guitar with lounge chord jazz patterns, ' almost sounds as if it could have been recorded around 1920 ," says Riley.

Chapter 17 of William Bates ' 1920 book Perfect Sight Without Glasses, in which the author argues that observation of the sun is beneficial to those with poor vision, includes a figure of somebody " Focussing the Rays of the Sun Upon the Eye of a Patient by Means of a Burning Glass.

Banach spaces are named after the Polish mathematician Stefan Banach who introduced them in 1920 – 1922 along with Hans Hahn and Eduard Helly .< ref >

In 1920 the Advertiser was merged with The Boston Record, initially the combined newspaper was called the Boston Advertiser however when the combined newspaper became an illustrated tabloid in 1921 it was renamed The Boston American.

In the 1920 Census, he is recorded as having returned to the Freestone County area, and he was living with his half-brother Kit Banks on a farm between Wortham and Streetman.

The Black and Tans were not subject to strict discipline in their early months in Ireland and as a result, their deaths at the hands of the IRA in 1920 were often repaid with arbitrary reprisals against the civilian population.

In the summer of 1920, the Black and Tans burned and sacked many small towns and villages in Ireland, beginning with Tuam in County Galway in July 1920 and also including Trim, Balbriggan, Knockcroghery, Thurles and Templemore amongst many others.

Taken together with an increased emphasis on discipline in the RIC, this helped to curb the random atrocities the Black and Tans committed since March 1920 for the remainder of the war, if only because reprisals were now directed from above rather than being the result of a spontaneous desire for revenge.

By 1920, Cambridge was one of the main industrial cities of New England, with nearly 120, 000 residents.

In 1920, he developed a notorious reputation with the entry of " Princess X " in the Salon.

Conan Doyle was preoccupied with organising an imminent lecture tour of Australia, and in July 1920, sent Gardner to meet the Wright family.

He was restored to Guangzhou with mercenary help in 1920.

* Colonial ( 1920 automobile ), the first American automobile with four-wheel brakes

Australia established its first central bank in 1920, Colombia in 1923, Mexico and Chile in 1925 and Canada and New Zealand in the aftermath of the Great Depression in 1934.

* 1920 – José López Portillo, Mexican politician, 31st President of Mexico ( d. 2004 )

* February 17 – José López Portillo, President of Mexico ( b. 1920 )

Taos Pueblo, New Mexico | Taos Pueblo, circa 1920

In 1920, there were about 150 000 German and German-descent people in Mexico ; Mexican population was about 13 million at that time.

Although the armed phase of the Mexican revolution had ended in 1920, Mexico had continued to encounter political unrest.

Collingsworth, Childress, Hall, Briscoe, Swisher, Castro, and Parmer counties along with Curry and Roosevelt counties in New Mexico raised $ 10, 000 in 1920 to erect markers along already existing roads to mark the Ozark Trail from Oklahoma across Texas to New Mexico.

Miel Carlota operated by partners Arturo Wulfrath and Juan Speck of Mexico operated at least 50, 000 hives of honey bees from 1920 to 1960.

José López Portillo y Pacheco ( June 16, 1920 – February 17, 2004 ) was the 51st President of Mexico from 1976 to 1982.

General Álvaro Obregón Salido ( 19 February 1880 – 17 July 1928 ) was the President of Mexico from 1920 to 1924.

Gutiérrez was appointed provisional President of Mexico by the Convention of Aguascalientes, a move that Venustiano Carranza ( 1859 – 1920 ) found intolerable.

On 20 May 1920, Carranza was killed in the state of Puebla in an ambush led by General Rodolfo Herrero as he fled from Mexico City to Veracruz on horseback.

For six months, from 1 June 1920 to 1 December 1920, Adolfo de la Huerta served as provisional president of Mexico until elections could be held.

Obregón appointed José Vasconcelos ( Rector of the National Autonomous University of Mexico who had been in exile 1915 – 1920 because of his opposition to Carranza ) as his Secretary of Public Education.

Between 1910 and 1920, Mexico City's character was largely influenced by President Porfirio Díaz.

He attended the National Preparatory School in Mexico City from 1920 – 1925, and then went to the National School of Law until 1928, completing his law degree with his thesis on occupational diseases and accidents among workers.

The Daughters of the American Revolution pushed New Mexico to design a contemporary and unique flag in 1920.

In 1920, students of then New Mexico College of Agriculture and Mechanic Arts scouted for an appropriate place to display their school letter.

Capurro died in 1920 ; some sources say in Naples while others say Mexico City.

The year in New York City had a politically radicalizing effect on her, and in 1920, she went to work for a magazine publisher in Mexico, where she became acquainted with members of the Mexican leftist movement, including Diego Rivera.

Between 1920 and 1930, Porter traveled back and forth between Mexico and New York City and began publishing short stories and essays.

Venustiano Carranza, President of Mexico from 1915 to 1920, who was born there in 1859.