 Complete the following phrase:  Eduard Karl Emanuel von Jachmann 2 March 1822  21 October 1887 was the first Vizeadmiral vice admiral of the Prussian Navy. He entered the navy in the 1840s after initially serving in the merchant marine. In 1848, Jachmann received his first command, the corvette ; through the 1850s and early 1860s, he held several other commands, including the frigates aboard which he took part in the Eulenburg expedition to East Asiaand . During the 