“Browse the timeline of war and conflict across the globe.”
This modification of Google maps depicts major and minor battles from thousands of years in the past to the most recent as red dots in their general location. Although not every single conflict ever is recorded (the earliest records start around 3000 BC) it does a pretty good job of getting some of the more obscure events in the history of warfare. Just drag the slider and see what occurred during the approximately 20 year period highlighted.
Check it out here: http://www.conflicthistory.com/#/period/3926BC-3916BC