 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 from liver cancer to continue in that post. Scheer proposed a more aggressive policy designed to force a confrontation with the British Grand Fleet; he received approval from the Kaiser in February. The first of Scheers operations was conducted the following month, on 57 March, with an uneventful sweep of the Hoofden. Another sortie followed three weeks later on the 26th, with another on 2122 April. On 24 April, the battlecruisers of Rear Admiral Franz von Hippers I Scouting Group conducted a 