这句话的they指代什么

李元芳

大家看看这句话里的they指代的什么？
The Olympic games helped to keep peace among the pugnacious states of the Greek world when    they     proclaimed a sacred truce for the festival month.
我记得从句they一般指代主句的主语啊，而这句话主句主语是olympic games,那应该用it不用they 啊，奥运会是单数吧

benjaminsandro

从句they一般指代主句的主语————没听说过这个规则
olympic games是复数
they指代the pugnacious states，首先离得近；其次，states才要proclaimed a sacred truce