The Navy SEAL who has written a firsthand account of the Osama bin Laden raid said Friday that he “faithfully fulfilled his duty” not to divulge classified information, after the Pentagon threatened him with legal action.

Robert Luskin, an attorney with Patton Boggs, responded Friday with a letter to Pentagon General Counsel Jeh Johnson on behalf of “Mark Owen,” the pseudonym of the SEAL author.

The Pentagon Thursday sent a letter to Owen threatening legal action – which could include criminal prosecution – over violating a non-disclosure agreement to “never divulge” classified information.

But Luskin wrote that Owen’s book “No Easy Day” did not violate the agreement.