Many web sites refer to time maps as the scrolling bar which is used to display event over time.  That is not what is meant by time maps here.  A time map on this page is a timeline integrated with a map, and events are displayed on the map based on their relevance to the current time points. 

An example of using time maps for the American Civil War can be found at http://chuckkann.com/Timemaps/CivilWar/default.html