The "Otranto Disaster" took place when the "SS Otranto" was rammed by another troop ship off the coast off the Isle of Islay.
Fault: Romeo also didn't work hard enough to restrain Mercutio
Description: Tybalt and Mercutio draw and fight out their swords. Romeo moves in between them to avoid the fighting and Tybalt stabs Mercutio under the arm of Romeo. Mercutio's wound is fatal and he dies screaming "A plague o ' your two homes!" Blinded with rage over the death of Mercutio, Romeo hits Tybalt and kills him.
The main reason was joining the Axis Powers, which earned them territory.