The deportation of 50,000 Jews from the Greek city of Thessaloniki began.

The Holocaust saw the mass murder of Greek Jews, mostly as a result of their deportation to Auschwitz concentration camp, during World War II. By 1945, between 82 and 92 percent of Greek Jews had been murdered, one of the highest proportions in Europe.

Thessaloniki is the second-largest city in Greece and the capital of the geographic region of Macedonia, the administrative region of Central Macedonia and the Decentralized Administration of Macedonia and Thrace. It is also known in Greek as i Symprotévousa, literally "the co-capital", a reference to its historical status as the "co-reigning" city of the Byzantine Empire alongside Constantinople.