Franciszek Sikorski

In 1912, he completed a military course for officers, and joined Polish Legions in World War I, as battalion commandant in the 3rd and later 4th Infantry Regiment.

Together with nearly 3800 Polish POWs held at the prison in Starobilsk, General Franciszek Sikorski was murdered by the NKVD in the spring of 1940 in Kharkiv, aged 50.

Ada, Maria and their mother were among the hundreds of thousands of Poles deported by the Soviet Union to forced labor camps in Siberia.

They managed to leave the Soviet Union with the newly created Polish Anders's Army for Iran in 1942.

As an adult, Ada Fighiera Sikorska was a leading Esperantist and editor of the “Heraldo de Esperanto".