This is a link to a marvellous article from Global Sisters Report, giving the history of almost two centuries of struggle between American Nuns and Church Male authority, local bishops in the earlier years, and the Vatican more recently.
I have great admiration for the U.S. sisters in the way they handled their recent dealings with the CDF. But I realised from this article that they have years of experience, and have developed a skill and a political savvy that is hard to resist.