In contrast to Source A, von Spiegel's account, Source B, the Zimmerman Telegram, expresses a different purpose for submarine warfare. According to the telegram, Germany uses submarine warfare because they do not want the balance of power to change in favor of the Allied powers; the Germans wish to keep the United States neutral and out of the war. This is stated specifically in the Zimmerman note: "We [the Germans] shall endeavor...to keep the United States of American neutral." Captain von Spiegel does not bring up anything about the U.S. in his journal entry but seems to be exceedingly honest and open about his infatuation towards beautiful horses. Also, unlike the Zimmerman telegram, von Spiegel's account emphasizes the reduction of "England's fighting power" on the Western front to protect Germany and her people.
Source A disagrees with Source B in the way that von Spiegel's account shows the humanity and compassion in the Germans. Not only does Captain von Spiegel show remorse for the lives he takes when he bombs the passenger ship, but he cannot bear to watch all the men, women, and animals scrambling about, terrified, knowing that their ship is sinking and death is just around the corner. As recorded in his journal, "At that point I could not bear the sight any longer, and I lowered the periscope and dived deep." However, the Zimmerman Telegram shows the Germans as impersonal and calculating. No where in the telegram mentions the casualties that unrestricted submarine warfare will cause, the civilians that will die. The Germans seem to be only worried about the possibility of the United States entering the Great War and the impact it will make.