Jul 1870–May 1871Franco-Prussian War
Jan 1871Prussia unifiesGermany
Jul 1871British Columbiajoins Canada
Aug 1871–Jun 1921Canada signs NumberedTreaties with indigenouspeoples of northwest
Jul 1872–Aug 1874Austro-Hungariansdiscover Franz Josef Land
Oct 1872San Juan Is. awarded to US
Jul 1873Prince Edward I.joins Canada
Apr 1874British confirm claimto Arctic Territories
Jul–Oct 1874Canadian mountiesmarch on Fort Whoop-Up
7 May 1875Treaty of St Petersburg:Japan exchanges claimto Sakhalin for Kuril Is.