sentences:  Born in Tondern (Tønder), Schleswig, in 1830 Bahnsen began his study of philosophy and (under Gregor Wilhelm Nitzsch) philology in Kiel.From 1849 he fought as a volunteer against the Danes in the First War of Schleswig (1848–1851) and fled to Tübingen in the Kingdom of Württemberg after the disarming of Schleswig-Holstein’s army in 1850.There he studied philosophy and in 1853 graduated under Friedrich Theodor Vischer with a topic relating to the aesthetics.