Sentence:  In addition, an ordinance was published that “all who had ever borne arms for the king, or declared themselves to be of the royal party, should be <WSD>decimated</WSD>, that is, pay a tenth part of all the estate which they had left, to support the charge which the commonwealth was put to... 
Meaning of the word marked with <WSD> tags:  To exact a tithe or other 10% tax