 Complete the following phrase:  Bruno Sattler was born at Schmargendorf, a rapidly expanding municipality on the south-western edge of Berlin, into which it has subsequently been subsumed. During the First World War he deferred the final part of his schooling in order to serve with the Imperial Army in France. He therefore passed his Abitur school graduation exam only in 1919, the year of his twenty-first birthday. Passing the Abitur opened the way to university-level education, and he embarked on a course of study in and Botany. He pursued his studies for three years. He also found time to join the Ehrhardt Brigade, one of the Freikorps units of defeated former imperial army soldiers that emerged during the 