Battle of Backbone Mountain Main menu Main menu move to sidebar hide Navigation Main pageContentsCurrent eventsRandom articleAbout WikipediaContact usDonate Contribute HelpLearn to editCommunity portalRecent changesUpload file Search Search Create account Log in Personal tools Create account Log in Pages for logged out editors learn more ContributionsTalk 1 language اردو Edit links CategoryTalk English ReadView history Tools Tools move to sidebar hide Actions ReadView history General What links hereRelated changesUpload fileSpecial pagesPermanent linkPage informationGet shortened URLDownload QR codeWikidata item Print/export Download as PDFPrintable version In other projects Wikimedia Commons Arkansas portalUnited States portalHistory portal This category is for topics specifically related to the year 1866 in the U.S. state of Arkansas. 18611862186318641865186618671868186918701871 1810s1820s1830s1840s1850s1860s1870s1880s1890s1900s1910s Subcategories This category has the following 2 subcategories, out of 2 total. / 1866 disestablishments in Arkansas (1 P) 1866 establishments in Arkansas (11 P) Toggle limited content width