 The suicide of <unk> on 9 June 68 brought the Julio @-@ <unk> dynasty to an end , leading to the chaotic Year of the Four <unk> , which saw the successive rise and fall of the emperors <unk> , <unk> and <unk> , until the accession of <unk> on 21 December 69 . <unk> nothing is known of <unk> 's whereabouts during 69 , but despite the fact that <unk> was his brother @-@ in @-@ law , he appears to have been one of the earliest and strongest supporters of the <unk> . 
