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I'll organize revolt. Exact a death for a death. Eye for an eye?

And I'll never rest until every Saxon
in this shire can stand up, free men...Why the plural?

and strike a blow (revenge?) for Richard and England.
Comments  
I'll organize revolt. Exact a death for a death. Eye for an eye?

Yes. Kill one of theirs for every one they've killed of ours.

And I'll never rest until every Saxon
in this shire can stand up, free men...Why the plural?

I don't know. Either 'a free man' or 'free men'. He is addressing the Saxons as a group.

and strike a blow (revenge?) for Richard and England.

Hmm, yeah. Fight for him.
Thank you, ferdis!