Complex sentence: Leaving the service after the war, he studied jurisprudence at Heidelberg, Göttingen and Jena, where he became a member of the Urburschenschaft, and in 1819 went for a while to Geneva to complete his studies.
Split into simpler sentences: Leaving the service after the war, he studied jurisprudence at Heidelberg, Göttingen and Jena, where he became a member of the Urburschenschaft. In 1819, he went for a while to Geneva to complete his studies.