Complex sentence: Upon the resignation of Liam Fox over a scandal in October 2011, Hammond was promoted Secretary of State for Defence and, in July 2014, he became Secretary of State for Foreign and Commonwealth Affairs.
Split into simpler sentences: Upon the resignation of Liam Fox over a scandal in October 2011, Hammond was promoted to become Secretary of State for Defence. In July 2014, he became Secretary of State for Foreign and Commonwealth Affairs.