Complex sentence: Schuschnigg was born in Riva del Garda (current province of Trento, Italy, then part of Austria-Hungary), and fought in the Austro-Hungarian Army during the First World War.
Split into simpler sentences: Schuschnigg was born in Riva del Garda (current province of Trento, Italy, then part of Austria-Hungary). Schuschnigg fought in the Austro-Hungarian Army during the First World War.