vanguard of the German line of battle. During the operation on the morning of 16 December, the High Seas Fleet, commanded by Admiral Friedrich von Ingenohl, briefly clashed with the destroyer screen of the British 1st Battlecruiser Squadron and the 2nd Battle Squadron, which had been sent to intercept their German counterparts (as the British were able to decipher German codes thanks to a set of code books captured from the cruiser in August). Ingenohl, under orders from the Kaiser not to risk the fleet and fearing he had located the scouts for the entire Grand Fleet, disengaged and returned to port. Markgraf and Kronprinz both completed their trials in January 1915, after which they joined their sisters in III Battle Squadron. They took part in a series of sweeps into the North Sea that failed to locate British forces through 1915, by which time Ingenohl had been replaced by Admiral Hugo von Pohl. They also supported mine-laying operations in the North Sea and periodically rotated through the Baltic for periods of training. These operations continued into early 1916, when Pohl was in turn replaced by Reinhard Scheer. The ships again provided cover for I Scouting Group when it bombarded Yarmouth and Lowestoft in April. When the Grand Fleet sortied in response to the raid, Scheer took the fleet back to port to avoid a confrontation with the numerically superior British fleet. Battle of Jutland The four ships took part in the fleet sortie that resulted in the battle of Jutland on 31 May–1 June 1916. The operation again sought to draw out and isolate a portion of the Grand Fleet and destroy it before the main British fleet could retaliate. König, Grosser Kurfürst, Markgraf, and Kronprinz made up V Division of III Battle Squadron, and they were the vanguard of the fleet. III Battle Squadron was the first of three battleship units; directly astern were the Kaiser-class battleships of VI Division, III Battle Squadron. Astern of the Kaiser-class ships were the Helgoland and Nassau classes of the I Battle Squadron; in the rear guard were the elderly pre-dreadnoughts of II Battle Squadron. Shortly before 16:00 CET, the battlecruisers of I Scouting Group encountered the British 1st Battlecruiser Squadron, under the command of David Beatty. The opposing ships began an artillery duel that saw the destruction of , shortly after 17:00, and , less than a half an hour later.