Władysław Eugeniusz Sikorski (Polish pronunciation: [vwaˈdɨswaf ɕiˈkɔrskʲi] ; 20 May 1881 – 4 July 1943) was a Polish military and political leader.
Prior to the First World War, Sikorski established and participated in several underground organizations that promoted the cause of the independence of Poland from the Russian Empire. He fought with distinction in the Polish Legions during the First World War, and later in the newly created Polish Army during the Polish–Soviet War of 1919 to 1921.
In July 1943, a plane carrying Sikorski plunged into the sea immediately after takeoff from Gibraltar, killing all on board except the pilot. The exact circumstances of Sikorski's death have been disputed and have given rise to a number of different theories surrounding the crash and his death. Sikorski had been the most prestigious leader of the Polish exiles, and his death was a severe setback for the Polish cause. Władysław Sikorski in Wikipedia