Why did Noor, a Muslim Indian princess, join the British secret service in WWII? What made nurses Susan Travers follow de Gaulle to Bir Hakeim and Geneviève de Galard work the Dien Bien Phufield hospital? What made Lydia Litvyak challenge Hitler's pilots over Stalingrad, or Hannah Szenes return to Eastern Europe to save Jews from Auschwitz? What drove Jihane Ahmed to risk her life fighting? Why did Cassiopée, a student, join the French army as a spy during Operation Barkhane in Mali?