 Nyora kupfuurira kweiyi ndima - Kazimierz Leski akaberekerwa muWarsaw musi wa 21 Chikumi 1912. Baba vake, Major Juliusz Leski, vakanga vari injiniya uye piyona wePolands arms industry. Zvisinei, akawira kunze kwenyasha pashure peMay 1926 Coup dÉtat, apo iye akaramba akavimbika kuhurumende. Somugumisiro, Kazimierz aifanira kushanda somushandi wechitima kuti abhadhare zvidzidzo zvake paWawelberg neRotwand College muWarsaw. Akawanawo basa rakapfava muimba yokuisira yePocisk munitions works. Kuti adzidze mabhuku ounyanzvi, akadzidza chiRungu, chiRussian nechiGerman hunyanzvi hwakaratidza kuve husingakoshi gare gare. Pakutanga, akadzidzawo chiFrench. 