  Rosenzweig spent the last months of the war in and out of military hospitals for bouts of influenza, pneumonia, and malaria. At the end of August, 1918, he began writing The Star of Redemption and sending what he wrote back home to his mother on military postcards. After the war ended, he returned home first to Kassel, and then to Freiburg, devoting himself entirely to writing. He finished the Star in the middle of February, 1919.