text: Between June of 68 and December of 69 , Rome witnessed the successive rise and fall of Galba , Otho and Vitellius until the final accession of Vespasian , first ruler of the Flavian Dynasty .
simplified: Between June of 68 and December of 69 , Rome witnessed the successive rise and fall of Galba , Otho and Vitellius until the final accession of Vespasian , the first ruler of the Flavian Dynasty .