Original: 1945 & ndash ; World War II : The Wilhelm Gustloff , overfilled with refugees , sinks in the Baltic Sea after being torpedoed by a Soviet submarine , leading to the deadliest known maritime disaster , killing approximately 9,000 people .
Simplified: 1945 -- The Wilhelm Gustloff sinks in the Baltic Sea in the deadliest maritime disaster in known history , killing roughly 9,000 .