Editing 1915 (section)

=== December ===
{{main|December 1915}}
* [[December 4]]–[[December 18|18]] – The '[[Peace Ship]]' ''Oscar II'' chartered by industrialist [[Henry Ford]] sails from [[Hoboken, New Jersey]] to [[Oslo]] on an independent and eventually unsuccessful mission to broker a peace conference.<ref>{{cite book|last=Watts|first=Steven|title=The People's Tycoon: Henry Ford and the American Century|url=https://archive.org/details/peoplestycoonhen00watt|url-access=registration|year=2005|publisher=Alfred A. Knopf|location=New York|page=[https://archive.org/details/peoplestycoonhen00watt/page/228 228]|isbn=978-0-375-40735-2 }}</ref>
* [[December 8]] – [[Jean Sibelius]] conducts the world première of his [[Symphony No. 5 (Sibelius)|Symphony No. 5]] in [[Helsinki]] at a 50th birthday concert for him.<ref>{{cite book|first=Jon|last=Paxman|title=Classical Music 1600–2000: A Chronology|location=London|publisher=Omnibus|year=2014|isbn=978-1-84449-773-7}}</ref>
* [[December 10]] – The 1&nbsp;millionth [[Ford Motor Company|Ford]] car rolls off the assembly line at the [[River Rouge Plant]] in [[Detroit]], Michigan.
* [[December 12]] – [[President of the Republic of China]] [[Yuan Shikai]] declares himself [[Empire of China (1915–16)|Emperor]].
* [[December 18]] – United States President [[Woodrow Wilson]] marries [[Edith Bolling Galt Wilson|Edith B. Galt]], in Washington, D.C.
* [[December 23]] – [[HMHS Britannic|HMHS ''Britannic'']], which will be the largest British ship lost in WWI (though with only 30 fatalities), departs [[Liverpool]] on her maiden voyage as a [[hospital ship]].
* [[December 26]] – The [[Irish Republican Brotherhood]] Military Council decides to stage an [[Easter Rising]] in 1916.