The year 1888 is commonly called Year of Three Emperors(Dreikaiserjahr) in Germany. It is learned by German schoolchildren with the mnemonic "three eights, three Emperors".
On March 9, the first German Emperor Wilhelm I died. He was succeeded by his son, Friedrich III, who however already suffered from cancer and died after only 99 days on June 15. He in turn was followed by his son, Wilhelm II, the third and last Emperor, who was to reign until the end of the Empire in 1918.
Moreover, in the start of the civil year of 69 in January 1, the legions of Germania Inferior refused to swear allegiance and obedience to the new emperor.
On the news of Otho's suicide, Vitellius was recognised as emperor by the Senate.
It was the 21st of December of 69, the year that had begun with Galba on the throne.