Haapalah / Aliyah Bet

Mossad leAliyah Bet.

On March 7, 1939, Atrato sailed from Bari, carrying 378 passengers, organized by Mossad leAliyah Bet.
Paul H. Silverstone cites Atrato sailing from Bari or Sušak (Rijeka/Fiume).
Israel Navy (חיל הים) Association cites Atrato sailing from Sušak (Rijeka/Fiume).

In 1943, Bari was the only European city to experience chemical warfare in the course of World War II.
On December 2, 1943, German Junkers Ju 88 bombers attacked Bari, a key supply centre for Allied forces fighting their way up the Italian Peninsula, and sank several Allied ships, including the United States Liberty ship, John Harvey, which carried mustard gas; mustard gas was also reported to have been stacked on the quayside awaiting transport, intended for use if German forces initiated chemical warfare.
On orders from Franklin Delano Roosevelt, Winston Churchill and Dwight D. Eisenhower, records were destroyed, and the affair was kept secret the records were declassified in 1959.