Lassche became renowned for his report about the 'Forgotten Poles during the Battle for Arnhem', for which he took the last journalistic television-interview with prince Bernhard. Following this documentary, Queen Beatrix honored the 1st Independent Polish Parachute Brigade with the Military Order of William on May 31, 2006. The commander of the Brigade, the late Major General Stanisław Sosabowski, was awarded the "Bronze Lion" posthumously.