Editing 1920 (section)

===July===
{{Main|July 1920}}
* [[July 1]] &ndash; [[Weimar Republic|Germany]] declares its neutrality in the [[Polish–Soviet War]].
* [[July 2]] &ndash; [[Polish–Soviet War]]: The [[Red Army]] continues its offensive into [[Second Polish Republic|Poland]].
* [[July 7]] &ndash; [[Arthur Meighen]] becomes Canada's ninth [[Prime Minister of Canada|prime minister]].
* [[July 11]] &ndash; The [[East Prussian plebiscite]] determines that most of the territory in question will remain German.
* [[July 12]] &ndash; [[Soviet–Lithuanian Peace Treaty]]: The [[Russian Soviet Federative Socialist Republic]] recognizes independent [[Lithuania]].
* [[July 19]]–[[August 7]] &ndash; The [[2nd World Congress of the Comintern|Second Congress]] of the [[Comintern|Communist International]] takes place in [[Saint Petersburg]] and Moscow; the [[Twenty-one Conditions]] are adopted.
* [[July 20]] &ndash; The United Kingdom cedes its brief control of the key [[Black Sea]] port of [[Batumi|Batum]] to the [[Democratic Republic of Georgia]].
* [[July 21]] &ndash; The [[Interallied Mission to Poland]] takes place.
* [[July 22]] &ndash; [[Polish–Soviet War]]: [[Second Polish Republic|Poland]] sues for peace with [[Russian Soviet Federative Socialist Republic|Soviet Russia]] (which refuses).
* [[July 24]] &ndash; [[Battle of Maysalun]]: The [[French Third Republic|French]] defeat the [[Syria (region)|Syria]]n army, whose leader [[Yusuf al-'Azma]] is killed. French troops occupy [[Damascus]] and depose [[Faisal I of Iraq|Faisal I of Syria]] as king.<ref name="French occupation of Syria">{{cite book|title=World War I|url=https://archive.org/details/worldwari0000carl|url-access=registration|last=Carlisle|first=Rodney|year=2007|page=[https://archive.org/details/worldwari0000carl/page/291 291]|publisher=Facts on File|isbn=978-0-8160-6061-0}}</ref>
* [[July 26]] &ndash; [[Mexican Revolution]]: [[Pancho Villa]] takes over [[Sabinas Hidalgo, Nuevo León|Sabina]] and contacts Mexican president de la Huerta to offer his conditional surrender, which he signs on [[July 28]].
* [[July 29]] &ndash; The [[United States Bureau of Reclamation]] begins construction of the [[Link River Dam]], as part of the [[Klamath Reclamation Project]].
* [[July 30]]–[[August 8]] &ndash; The [[1st World Scout Jamboree]] is held at [[Olympia, London]].<ref>{{cite web|url=http://www.pinetreeweb.com/1920-jamboree.htm|title=1st World Jamboree|work=The Pine Tree Web|year=1998|access-date=2011-02-23|archive-url=https://web.archive.org/web/20110514054243/http://www.pinetreeweb.com/1920-jamboree.htm|archive-date=May 14, 2011|url-status=dead|df=mdy-all}}</ref>
* [[July 31]]
** Irish-born Australian [[Catholic Church|Catholic]] Archbishop [[Daniel Mannix]] is detained on board ship by British authorities off [[Cobh|Queenstown]] and prevented from landing in Ireland or from speaking in the main Irish Catholic communities elsewhere in the United Kingdom.<ref>{{cite ODNB|first=Patrick|last=O'Farrell|title=Mannix, Daniel (1864–1963)|year=2004|url=http://www.oxforddnb.com/view/article/55446|access-date=2011-11-11|doi=10.1093/ref:odnb/55446}}</ref>
** France prohibits the sale or prescription of [[birth control|contraceptives]].
** Representatives of [[British people|British]] [[Revolutionary socialism|revolutionary socialist]] groups meet at the Cannon Street Hotel in [[London]] and agree to form the [[Communist Party of Great Britain]].