comment t1_dvdzhy0 re: When was the last Civil War-related violence?
reddit (comment)
{ posted: Thursday, 8 March, 2018 at 1:34pm // views: 11 // words: 124 }

John J. Williams is usually considered the last casualty of the War at the Battle of Palmito Ranch on May 13, 1865 in Texas. Confederate General Kirby Smith surrendered his forces later that month, then the last Confederate General to surrender, Stand Watie, did so June 23rd.

On June 23rd, the CSS Shenandoah learned of Lee's Surrender via newspaper, but saw in the same paper Jefferson Davis' proclamation that the "war would be carried on with re-newed vigor", so they continued capturing Union whalers. The ship was not surrender to British authorities until November 6, 1865.

Beyond that, a number of local conflicts continued for years in border areas like Kansas and Missouri, West Virginia, etc… (eg. the Hatfields and McCoys)

[context: PMcCullough @ reddit]