How trustworthy are ancient sources (e.g., claims about invincibility)?

Lucius

Historum Emeritas
Jan 2007
16,363
Nebraska
Ancient sources are mostly accurate in regard to the names of the rulers.
 

Vaeltaja

Ad Honorem
Sep 2012
3,700
Ancient sources are mostly accurate in regard to the names of the rulers.
Pretty much this. While they often, though not always, have some vestige of truth in them the stories tend to have been vastly exaggerated and usually tilted to be more supportive of the 'home-side'.
 

Rodger

Ad Honorem
Jun 2014
6,171
US
As far as the events of history, consider a few things: in those days it was considered appropriate to attribute events, happenings, sayings, etc. to those of fame. For example, in the NT of the Bible, anonymous writers attributed their writing to a more famous apostle. Moreover, today we see journalists, the media, apologists, etc. exaggerate (or at least attempt to) even with the techniques modern humanity has to check and fact check. You can almost be assured this happened in the past, even to a greater degree. To propagandize your position was likely considered quite acceptable, almost like wishful thinking.