Greene–Jones War
The Greene–Jones War was an ongoing Appalachian Mountain clan feud in the United States reputed to be second only to that of the Hatfield–McCoy feud in scale, duration, and number of persons killed. At least sixteen people, including one child, were killed during the course of the feud, and many others were seriously injured. The feud took place primarily in the border areas of Hawkins County (formerly part of Sullivan County, North Carolina, one of the earliest Tennessee counties and said to have a large Melungeon population), Washington County, Claiborne County, Hancock County, Tennessee (created when Hawkins County, Tennessee was subdivided), and Lee County, Virginia, not far from Cumberland Gap, the narrow Appalachian Mountain pass sometimes called The Wilderness Road leading into Kentucky.
List of battles and other violent events by death toll
This section lists bombing camapaigns in which at least 1000 individuals may have been killed.This section lists bombing camapaigns in which at least 500 individuals may have been killed.
The loss of two British cruisers to a German naval squadron at the Battle of Coronel on 1 November 1914 was followed by the Battle of the Falkland Islands on 8 December where most of the German force was destroyed. 
The Battle of Jutland on 31 May 1916 was the largest naval battle during World War I and resulted in the loss of three British battlecruisers and three armored cruisers.