Hannie Schaft was born in Haarlem. Her mother was a Mennonite and her father was attached to the Social Democratic Workers' Party. During her law studies at the Universiteit van Amsterdam she became friends with the Jewish students Philine Polak and Sonja Frenk. This made her feel strongly about actions against Jews. With the German occupation of the Netherlands in World War II university students were required to sign a declaration of allegiance to the occupation authorities. When Hannie refused to sign the petition in support of the occupation forces, she could not continue her studies and moved in with her parents again. She became more and more active in the resistance movement and helped people who were hiding from the Germans with stolen identification cards and food-coupons.