 Since the Austrian fleet was occupied with Prussia's ally Italy during the war, the Prussian Navy saw relatively little action; the only major operations were conducted in the North Sea, under the command of "KzS" Reinhold von Werner.On 17 July 1867, Jachmann attended the fleet review held in Spithead, Britain in honor of the Ottoman Sultan Abdülaziz.On 22 August, he became of the director of the Ministry for the Navy, serving under Roon.