Complex sentence: Instead, Metternich stayed six months, entrusting his office in Vienna to his own father, He set about using the marriage, combined with flattery, to renegotiate the terms set out at Schönbrunn.
Split into simpler sentences: Instead, Metternich stayed six months, entrusting his office in Vienna to his father. He soon set about using the marriage, combined with flattery, to renegotiate the terms set out at Schönbrunn.