translated ): socialist nation, we will be faiemful to the ary legacy of the commander in chief fidel castro ruz, historic leader of our revolution and also to the e, the value and teachin of armed force general raul castro ruz. >> brangham: though raul castro will remain head of the communist party, the island's most powerful post, 57-year-olde diaz-canel reps a new generation of cuban leaders.ra its a geon that wasn't fen alive during the 1959 cuban revolution, led byel castro which ousted the u.s.-backed government of fulgencio batista, and instituted a socialist state of his own. fidel's alliance with the soviet anunion quickly made the ian epicenter of cold war tensions. for the next five decaidel expanded state control over cuban life and cracked down on political dissent. as shortages grew on the island, fidel blamed the u.s. trade embargo. then in 2008, an ailing fidel officiallyanded the presidency to brother raul. aw a dramatic turn in u.s.-cuban relations: the two nations announced the re- establishment of diplomatic ties. in march 2016, then-president obama became the first president