During this decade, the D-notice system was formalized to ward off newspapers publishing on sensitive topics. Times editor Geoffrey Dawson refused to publish the anti-war Lansdowne Letter during this decade. The Maurice Debate took place during this decade and influenced whether or not candidates received the impactful coalition coupon. The ensuing (*) “coupon election” during this decade gave Sinn Féin (“shin fain”) their first Irish majority (-5[1])and split the Liberal Party led by H. H. Asquith. (10[1]-5[2])The Parliament Act was passed during this decade after the House of Lords vetoed the previous decade’s (10[1])“People’s Budget.” The Royal Air Force was formed in this decade during the David Lloyd George ministry. (10[1])For 10 points, name this decade during which a U-boat sunk the Lusitania. (10[2])■END■