Sinking Fate

After the ship hit a mysterious object it cracked into three pieces. The first piece the one that struck the explosive was vaporized. The second piece broke off after the back became too heavy to stay aloft as the mid section sank. Thirty minutes after that the stern finally went down. 15,000 barrels of Crude oil was lost leaving the Market price well over $7.77 a liter. The crew is joining investigators in finding the cause of the explosion but it is rumored that about 630 years ago a field of mines were placed their to sink ships carrying supplies to battle. One ship remains in the archives known only as Sister Ship.

Now for some trivia.
What ship am I talking about in history?
What event canceled the Olympics 1916?