For several decades after the war, families referred to the victims of the Roundup as “missing” because they did not know their fate. Many believed that they had been deported to Sybir, and that they would one day return. It was not until 2011 when Nikita Petrov, a researcher from the (now illeg

On 4 July 1943, at 23:07, moments after take-off from Gibraltar Airport, Liberator II aircraft AL523 with General Władysław Sikorski on board, crashed into the Mediterranean Sea.

On 4 July 1928, the founding congress of the Sybiraks' Association was held at the Warsaw University of Technology.