system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How much time has to pass before discovering and studying an old civilization/settlement/etc is considered Archaeology?

For example, studying Egyptian pyramids and ruins is Archaeology, but studying a mid 20th century warzone is not. At what point can we consider the study of an event, Archaeology?
gpt
Archaeology is the study of history through artifacts.  If people don't actually remember what happened there, requiring other ways of studying it, then I'd say we have archaeology.  Paleo-archaeology would be the study of ancient (whatever that means) history.