Is it necessary to share such events with people? It seems what’s needed is a way to create the kind of timeline you want, in which such people-less events are included based on whether a person lived in a given place at a given time. In other words, it should just be a join condition for the query used by that chart or report (but I say this not knowing how things really work). Similarly, there could be a report of a series of events in a given place, for a given timeframe, with all the people who were affected, if it could work by selecting the people who were living in the place during the timeframe.
The Pandemic might not be a good example, since it was world-wide?