Requirements are prioritized to determine which requirements will be included and excluded from the project. Rationale/Purpose Defining requirements specifies the capabilities, features or attributes of the projectâs deliverables.
On January 31, 1917, Germany, determined to win its war of attrition against the Allies, announced it would resume unrestricted warfare in war-zone waters. Three days later, the United States broke diplomatic relations with Germany, and just hours after that the American ship Housatonic was sunk by a German U-boat.
WW1 Submarines. In the First Word War military submarines made a significant impact for the first time. The German U-Boats enjoyed a great deal of success and were responsible for destroying around half of all the food and supplies transported by the British Merchant Navy.hen the First World War began the German armed forces had 29 U-Boats at their disposal. In the first 10 weeks of the conflict they sank five British cruisers. Between October 1916 and January 1917 a grand total of 1.4 million tons of allied shipping was lost to the U-Boats.