Due to the chaotic period, it is unfortunately impossible to state the exact number of casualties, but more than 50 KU members are believed to have given their lives in a fight for the freedom of Denmark - more than any other youth organisation during the resistance. Bjarne Reuter, a popular and much appraised Danish author, has written the bestseller The Boys from St. Petri (Drengene fra Skt. Petri), a story of a group of young boys who form a resistance group and repeatedly sabotage and destroy Nazi installations until they are finally caught and sent to a concentration camp. The Boys from St. Petri is, in fact, the dramatization of the true story of 'Aalborg KU', and their resistance fight.
