but were recurrent disturbers of the Arab Empire.

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nguyen dung

Senior Member
Vietnamese
In "US history" Wikibook.org,page 7, there are the following sentences:

At the end of the eleventh century, prompted by Pope Urban II and calls for aid from the crumbling Eastern Roman Empire, some European kings and great nobles launched a century and a half of Crusades of hordes of Christians, first to reconquer, and then to hold, part of the Kingdom of Jerusalem from the Saracens (Arabs). The Crusaders ultimately failed in the face of powerful, resurgent, Muslim forces, but were recurrent disturbers of the Arab Empire. The Arabs were repeatedly torn by internal dynastic struggles such as Abbasides versus Fatimids, Shi'a versus Sunni, and numerous wars with the Turks (who succeeded them), Persians, and Mongols. The wars between Christian and Muslim empires lasted intermittently from the seventh century until World War I, and, to a degree, continue to the present in the Balkans, East Africa, Caucasus, East Indies, and Middle East.

What is the subject of the verb "were"?
 
  • Ponyprof

    Senior Member
    Canadian English
    You could insert "they" referring back to the Crusaders. The Crusaders were recurrent disturbers of the Arab world.
     
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