Editing 1920 (section)

===March===
{{Main|March 1920}}
* [[March 1]]
** Hungarian [[Admiral]] and statesman [[Miklós Horthy]] becomes the [[Regent]] of [[Kingdom of Hungary (1920–46)|Hungary]].
** The [[United States Railroad Administration]] returns control of American railroads to its constituent railroad companies.
* [[March 7]] &ndash; The Syrian National Congress proclaims [[Arab Kingdom of Syria|Syria]] independent, with [[Faisal I of Iraq]] as king.
* [[March 10]] &ndash; The world's first peaceful establishment of a [[social democracy|social democratic]] government takes place in [[Sweden]] as [[Hjalmar Branting]] takes over as [[Prime Minister of Sweden|prime minister]] when [[Nils Edén]] leaves office.
* [[March 13]]–[[March 17|17]] &ndash; [[Wolfgang Kapp]] and [[Walther von Lüttwitz]]'s ''[[Kapp Putsch]]'' (an attempted [[coup d'état|coup]] in Germany) briefly ousts the [[Weimar Republic]] government from Berlin, but fails due to public resistance and a general strike.
* [[March 15]] &ndash; The [[Ruhr Red Army]], a communist army 50,000 men strong, is formed in [[Weimar Republic|Germany]].
* [[March 15]]–[[March 16|16]] &ndash; [[Occupation of Constantinople#Military occupation of Constantinople|Constantinople is occupied]] by [[British Empire]] forces, acting for the [[Allies of World War I|Allied Powers]] against the [[Turkish National Movement]]. Retrospectively, the [[Grand National Assembly of Turkey]] regards this as the dissolution of the [[Ottoman Empire|Ottoman regime]] in [[Istanbul]].<ref>Declaration of 1 November [[1922]].</ref>
* [[March 18]] &ndash; [[Kingdom of Greece (Glücksburg)|Greece]] begins using the [[Gregorian calendar]].
* [[March 19]] &ndash; The [[United States Senate]] refuses to ratify the [[Treaty of Versailles]].
* [[March 23]] &ndash; Admiral [[Miklós Horthy]] declares that [[Kingdom of Hungary (1920–46)|Hungary]] is a monarchy, without anyone on the throne.
* [[March 25]] &ndash; [[Irish War of Independence]]: British recruits to the [[Royal Irish Constabulary]] begin to arrive in Ireland. They become known from their improvised uniforms as the "[[Black and Tans]]".<ref name=Cottrell>{{cite book|first=Peter|last=Cottrell|title=The War for Ireland, 1913-1923|location=Oxford|publisher=Osprey Publishing|year=2009|isbn=978-1-84603-9966}}</ref>
* [[March 26]]
** The German government asks France for permission to use its own troops against the rebellious [[Ruhr Red Army]], in the French-occupied area.
** American fiction writer [[F. Scott Fitzgerald]] makes his name with publication of ''[[This Side of Paradise]]''.
* [[March 28]] &ndash; The [[1920 Palm Sunday tornado outbreak]] hits the [[Great Lakes region]] and [[Deep South]] of the United States.
* [[March 29]] &ndash; [[Sir William Robertson, 1st Baronet|Sir William Robertson]] is promoted to [[Field Marshal (United Kingdom)|Field Marshal]], the first man to rise from [[Private (rank)|private]] (enlisted [[1877]]) to the highest rank in the [[British Army]].<ref>{{cite ODNB|url=http://www.oxforddnb.com/view/article/35786|title=Robertson, Sir William Robert, first baronet (1860–1933)|first=David R.|last=Woodward |edition=Online|doi=10.1093/ref:odnb/35786|access-date=2007-12-07 |date=September 2004}}</ref>