general bloodletting

gen·er·al blood·let·ting

removing blood by arteriotomy or phlebotomy.
References in periodicals archive ?
Martin's books, I don't know Jon Snow's fate, but given the general bloodletting in the fantasy land of Westeros, Harington could be without hair -- or a head
An account of the curative effects of the abstraction of blood: with rules for employing both local and general bloodletting in the treatment of diseases.
and the start of a general bloodletting aimed at getting rid of left-wingers.
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