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. (15[1])The ensuing (*) “coupon election” during this decade gave (10[1])Sinn Féin (“shin fain”) their first Irish majority (10[1])and split the Liberal Party led by H. H. Asquith. (-5[1])The Parliament Act was passed during this decade after the House of Lords vetoed the previous decade’s “People’s Budget.” The Royal Air Force was formed in this decade during the David Lloyd George ministry. For 10 points, name this decade during which a (10[1])U-boat sunk the Lusitania. ■END■ (10[1])