to do sth in support of / against a belief, principle, etc. :
He felt that they had struck a blow for democracy.
to do sth in support of / against a belief, principle, etc. :
He felt that they had struck a blow for democracy.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005