The Americans had also practised unrestricted submarine warfare, under their own equivalent to the Laconia Order, which had been in force since they entered the war. Fleet Admiral Chester Nimitz, the wartime commander-in-chief of the US Pacific Fleet, provided unapologetic written testimony on Dönitz's behalf at his trial that the US Navy had waged unrestricted submarine warfare in the Pacific from the very first day the United States entered the war. This testimony led the Nuremberg Tribunal to not impose a sentence upon Dönitz for this breach of law, even though he was convicted of the count.