 Complete the following phrase:  At the start of this war, which mostly took place in Eastern Bohemia Czech Republic, Gablenz was considered to be one of the foremost Austrian generals. During this war Gablenz commanded the X Corps in FZM Benedeks Northern Army. Although victorious against Bonins I Corps at Trautenau Trutnov, 27 June 1866 in the only Austrian victory against the Prussians, Glabenzs position became untenable due to the Austrian loss at Náchod and the Prussian Guard Corps advance towards Eipel Upice, and he was ordered to retreat towards Prausnitz to block the Prussian Guards. The next day at Burkersdorf, Gablenz managed to extricate his corps though with heavy casualties. After reuniting with the main army Gablenz and X Corps fought at 