Complex sentence: The Prussians occupied the northern part of Württemberg and negotiated a peace in August 1866; by this Württemberg paid an indemnity of 8,000,000 gulden, but she at once concluded a secret offensive and defensive treaty with her conqueror.
Split into simpler sentences: The Prussians occupied the northern part of Württemberg and negotiated a peace in August 1866. By this, Württemberg paid an indemnity of 8,000,000 gulden, but she at once concluded a secret offensive and defensive treaty with her conqueror.