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.
The Sikorski-Mayski Agreement - Document that Gave Freedom
On 4 July 1928, the founding congress of the Sybiraks' Association was held at the Warsaw University of Technology.
