Editing 1930 (section)

===October===
{{Main|October 1930}}
[[File:Ståhlbergs' at the railwaystation.jpg|thumb|upright|Former President of Finland [[Kaarlo Juho Ståhlberg|K. J. Ståhlberg]] and his wife [[Ester Ståhlberg|Ester]] at the [[Helsinki Central Station]] after their kidnapping. In the middle of picture their daughter Elli stands behind them.]]
* [[October]] – The [[Indochinese Communist Party]] is formed.
* [[October 1]] – [[British Weihaiwei|British rule of Weihaiwei]] ends, as it is returned to China.
* [[October 3]] – The [[German Socialist Labour Party in Poland – Left]] is founded, following a split in the [[German Socialist Labour Party of Poland|DSAP]] in [[Łódź]].
* [[October 5]] – British [[airship]] ''[[R101]]'', the world's largest flying craft, crashes in France en route to India, on its first overseas flight, resulting in the loss of 48 lives, with six survivors. Those killed include Britain's Air Minister, [[Christopher Thomson, 1st Baron Thomson]].<ref>[https://www.aht.ndirect.co.uk/airships/r101/R101%20Passenger%20%20Crew%20List.htm "R101 Passenger List."] {{Webarchive|url=https://web.archive.org/web/20090830231632/http://www.aht.ndirect.co.uk/airships/r101/R101%20Passenger%20%20Crew%20List.htm |date=August 30, 2009 }} ''Airship Heritage Trust'' via ''Airshipsonline.'' Retrieved: 27 August 2010.</ref>
* [[October 14]] – [[Ståhlberg kidnapping]]: The former and first [[President of Finland]], [[Kaarlo Juho Ståhlberg]], and his wife, [[Ester Ståhlberg]], are kidnapped from their home by members of the far-right [[Lapua Movement]] but released unharmed.<ref>{{Cite book|title=Defending Democracy: Reactions to Extremism in Interwar Europe|last=Capoccia|first=Giovanni|publisher=JHU Press|year=2005}}</ref><ref>{{Cite book|title=A Frozen Hell: The Russo-Finnish Winter War of 1939-40|last=Trotter|first=William R.|publisher=Algonquin Books of Chapel Hill|year=1991|isbn=978-0-945575-22-1|location=[[Chapel Hill, North Carolina]]}}</ref>
* [[October 20]] – The British [[Passfield white paper]] demands restrictions on Jewish immigration into [[Mandatory Palestine]].<ref name=CBH>{{cite book|last1=Palmer|first1=Alan|last2=Palmer |first2=Veronica|year=1992|title=The Chronology of British History|publisher=Century Ltd|location=London|pages=372–373|isbn=978-0-7126-5616-0}}</ref>
* [[October 24]] – [[Brazilian Revolution of 1930]]: [[Getúlio Vargas]] overthrows [[Washington Luís]].
* [[October 27]] – Ratifications are exchanged in London on the first [[London Naval Treaty]] signed in April, modifying the [[Washington Naval Treaty]] of 1922. Its arms limitation provisions go into effect immediately, hence putting more limits on the expensive naval arms race between its five signatories (the United Kingdom, the United States, the [[Empire of Japan]], France and Italy.)