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 Asia—and . During the Second Schleswig War in 1864, he commanded Prussian naval forces in the Baltic from Arcona, and led a small squadron at the Battle of Jasmund on 17 March. Though defeated in that battle, he was promoted to Konteradmiral (rear admiral) for his aggressive handling of the Prussian fleet. Jachmann was the senior-most officer in the Prussian Navy by the mid-1860s, second only to Prince Adalbert of Prussia. In 1867, Jachmann became the director of the Ministry of the Navy, and the following year, he was promoted to Vizeadmiral. During the Franco-Prussian War of 1870–1871, he commanded the squadron of ironclad warships based in the North Sea, though his ships saw no action owing to engine difficulties. After the war, he oversaw the founding of the Imperial Naval Academy at Kiel and the organization of the North Sea Naval Station. He expected to be named the first Chief of the Imperial Admiralty in 1872, but he was passed over in favor of the Prussian Army General Albrecht von Stosch. Embittered by the decision, Jachmann retired from the navy in 1874. Jachmann retired to Oldenburg with his family, though he returned to naval affairs in 1878 following the accidental sinking of during a training cruise. Jachmann used the incident to attack Stosch, first through anonymously published letters criticising his training program, and then as part of a court martial that placed blame for the accident on Carl Ferdinand Batsch, Stosch's protege. Jachmann thereafter left the public eye until his death on 21 October 1887. Early life Jachmann was born in Danzig on 2 March 1822, the youngest of seven children, to Dr. R. H. Jachmann and Minna Jachmann (née Schaff). Eduard attended grammar school in Marienwerder. Against his father's wishes, Jachmann joined the merchant marine as a cabin boy in Danzig in 1839; at the time, it was uncommon for an educated young man to join the shipping industry. Over the winter of 1842–1843, he attended the