".... since it appeared last week, it has been the talk of military circles, where it was expected that Fallon would be disciplined ..."

Via War&Piece, Thos. Ricks has this to add, in the WaPo, here

"... The article was "definitely the straw that broke the camel's back," a retired general said, especially because of its "extraordinarily flip, damning and insulting" tone. He noted that since it appeared last week, it has been the talk of military circles, where it was expected that Fallon would be disciplined. ...

Peter D. Feaver, a former staff member of Bush's National Security Council, said that the public nature of Fallon's remarks made it necessary for the admiral to step down. "There is ample room for military leaders to debate administration policy behind closed doors," said Feaver, a political scientist at Duke University. "However, taking such arguments into the media would violate basic democratic norms of civil-military relations." ..."