Full Idea
Hume's maxim is that if one event cause another, then the two events must be wholly distinct.
Gist of Idea
If one event causes another, the two events must be wholly distinct
Source
report of David Hume (Treatise of Human Nature [1739]) by Wilson,G/Schpall,S - Action 3
Book Reference
'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.11
A Reaction
[Anyone know the original reference?] So we are not allowed to say that one part of an event caused another. The charged caused the victory, so they are two events, but in another context the whole battle is one event.