RMS Mauretania (1906) launched by the Duchess of Roxburghe. At the time of her launch, she was the largest moving structure ever built, and slightly larger in gross tonnage than "Lusitania". The main visual differences between "Mauretania" and "Lusitania" were that "Mauretania" was five feet longer and had different vents. "Mauretania" also had two extra stages of turbine blades in her forward turbines, making her slightly faster than "Lusitania". "Mauretania" and "Lusitania" were the only ships with direct-drive steam turbines to hold the Blue Riband; in later ships, reduction-geared turbines were mainly used. "Mauretania"s usage of the steam turbine was the largest application
First engagement of neutral United States in World War II before the attack on Pearl Harbor to attack. The "Niblack" attacked with depth charges and drove off the U-boat. There were no casualties on board "Niblack" or the U-boat. By coincidence, USS "Niblack" was later in the same convoy as, and picked up survivors from, the USS "Reuben James" when that ship was sunk. The first American hostile action against Axis forces that resulted in physical destruction was on 14 September 1941, when destroyed a German weather station in northeast Greenland. The action was based on an agreement with Danish Ambassador to the United States Henrik Kauffmann in April 1941 to patrol the Danish island. The