Complex sentence: Kelly succeeded General Douglas M. Fraser as commander of U.S. Southern Command on November 19,2012 and was in turn succeeded by Navy Admiral Kurt W. Tidd on January 14,2016.
Split into simpler sentences: Kelly succeeded General Douglas M. Fraser as commander of U.S. Southern Command on November 19,2012. Kelly was succeeded by Navy Admiral Kurt W. Tidd on January 14,2016.