I'm a 14th century bohemian peasant. While working my farm I see a knight with a flag I don't recognise. Should I assume he's an enemy? Did peasant's know what to look out for should someone attack?

by RewriteCinema
Folivao

Quick follow up question :

I'm still the same 14th century bohemian peasant, assuming I know that the knight is supposedly friendly or is my lord.

Would I be scared that he might just be violent or unpleasant (as in not respecting my property, my family, my fields etc) with me ?