Editing 1825 (section)

=== October–December ===
[[File:Kolman decembrists.jpg|thumb|December 14: The [[Decembrist revolt]] takes place in Russia.]]
* [[October 7]] – The [[1825 Miramichi Fire|Miramichi Fire]], a forest fire, breaks out in [[New Brunswick]] (Canada).
* [[October 21]] – [[PS Comet#Comet II|PS ''Comet II'']] sinks off [[Gourock]] (Scotland) with the loss of 62 lives.
* [[October 26]] – The [[Erie Canal]] opens, providing passage from [[Albany, New York]] to [[Buffalo, New York|Buffalo]] and [[Lake Erie]].
* [[November 7]] – The U.S. Senate ratifies the [[Treaty of Lewistown|treaty]] with the [[Shawnee]] tribe.<ref name=Niles/>
* [[November 15]] – King [[Joao VI of Portugal]] promulgates a law recognizing his eldest son, [[Pedro I of Brazil|Dom Pedro]], as the Emperor of Brazil.<ref>''The Annual Register, or A View of the History, Politics, and Literature for the Year 1828'' (Baldwin and Cradock, 1829) p428</ref>
* [[October]]–[[December]] – Dispute between the [[United Provinces of the Río de la Plata]] and the [[Empire of Brazil]] over [[Banda Oriental]] region led to the [[Cisplatine War]].
* [[December 1]] ([[Julian calendar|O.S.]])/[[November 19]] ([[Gregorian calendar|N.S.]]) – [[Nicholas I of Russia]] succeeds his older brother [[Alexander I of Russia|Alexander I]].
* [[December 9]] – The British began the [[Siege of Bharatpur (1825–1826)|Siege of Bharatpur]].
* [[December 26]] ([[Julian calendar|O.S.]])/[[December 14]] ([[Gregorian calendar|N.S.]]) – Some [[Imperial Russian Army]] officers stage the [[Decembrist revolt]] against Nicholas's accession in [[Saint Petersburg]], but it is thoroughly suppressed by the government.