In The Code Book, Simon Singh details the codebreaking successes of the British military during World War I–successes that often needed to be kept secret and prevented the spread of some important, yet sensitive information during the war. One such piece of critical information was the Zimmerman telegram. While some may think it completely unethical of Admiral Hall to withhold the information gathered after cracking the Zimmerman telegram from American intelligence, it was simply a fact of wartime priorities. The British were the ones embroiled in war, which is a time when a nation looks out for their own interest over the those of other nations (especially the United States, which was not active in the war at this time). Additionally, while America would surely suffer from the impending unrestricted u-boat warfare and lives would be lost from torpedo attacks, there are many reasons why Admiral Hall’s actions to allow these attacks to happen would also save lives in the long run. First, the information gathered by Britain’s Room 40 was crucial in British victories and undoubtedly saved the lives of many British soldiers and civilians. Also, Admiral Hall hoped these attacks would implicate America in the conflict in such a way that necessitated their entrance into the war, a policy chance that would hopefully help the Allies to win the war sooner and thus save more lives in the long run. Therefore, the lines drawn in this instance of ethical dilemma are not black and white, as is usually the case in times of war.