[Answer] 3. 7 May 1915 - The Lusitania was sunk by a German U-boat. What type of ship was Lusitania?

Step 1 : Introduction to the question "3. 7 May 1915 - The Lusitania was sunk by a German U-boat. What type of ship was Lusitania?"

...1. Cruiser 2. Destroyer 3. Passenger liner 4. Battleship Lusitania made her maiden voyage in September 1907 and was called the 'Greyhound of the Atlantic'. She won the Blue Ribbon for the fastest Atlantic crossing. She was sunk by a U-boat off the coast of Ireland and 1,119 of her passengers and crew were lost. It is sometimes said that the Lusitania was also carrying munitions at the time when she was sunk. Even if this is true, the sinking was a massive blunder for Germany as it did much to swing public opinion in America against Germany.

[Answer] The sinking of which ship in 1915 played a key role in turning opinion in the US against Germany?

Step 1 : Introduction to the question "The sinking of which ship in 1915 played a key role in turning opinion in the US against Germany?"

...SS Andrea Doria sunk in sight of shore much later, and the Titanic, well, that was pre-World War I. The Arandora Star was sunk off the coast of Ireland on 2 July 1940 in World War II while transporting interned Italian nationals (and some Germans) from Britain to Canada.

[Answer] 19 January 1915 - The first Zeppelin raid on Britain occurred. What was a Zeppelin?

Step 1 : Introduction to the question "19 January 1915 - The first Zeppelin raid on Britain occurred. What was a Zeppelin?"

...Airships were developed about 1870 by Count Ferdinand von Zeppelin. The first flight was in 1900 and they were used as bombers during the First World War. The largest airship built, Hindenburg, burst into flames and crashed in 1937.