 Complete the following phrase:  Vice Admiral Reinhard Scheer became Commander in chief of the High Seas Fleet on 18 January 1916 when Admiral von Pohl became too ill to continue in that post. Scheer favored a much more aggressive policy than that of his predecessor, and advocated greater usage of U-boats and zeppelins in coordinated attacks on the Grand Fleet; Scheer received approval from the Kaiser in February 1916 to carry out his intentions. Scheer ordered the fleet on sweeps of the North Sea on 26 March, 23 April, and 2122 April. The battlecruisers conducted another 