Complex sentence: He was created a count, and in December 1871, having resigned the ministries of war and marine, he succeeded Bismarck as president of the Prussian ministry ill-health compelled him to resign in the following year.
Split into simpler sentences: He was created a count, and in December 1871, having resigned the ministries of war and marine, he succeeded Bismarck as president of the Prussian ministry. Ill-health compelled him to resign in the following year.