ROUMANIA declares war on Austria, 27 Au 6; invades Transylvania, 28 Au 6; agrees to an armistice, 6 D 7; submits to a German ultimatum, 2 Mh 8; signs peace with Central Powers, 7 My 8 Rovereto captured by Italians, 23 N 5 _Royal Edward_ sunk, 14 Au 5 Roye captured by Germans, 26 Mh 8; retaken by French, 27 Au 8 Ruanda invaded by Belgians, 30 My 6 Rufigi River, fighting on the, 5 Ja 7 (_see also_ Königsberg) Rumanovo captured by Bulgarians, 22 O 5 Rujm-el-Bahr occupied by British, 26 F 8 _Russell_, H.M.S., sunk, 27 Ap 6 _Russia_ sunk, 14 D 6 RUSSIA: invades East Prussia, 7 Au 4; guarantees autonomy to Poland, 14 Au 4; the Grand Duke Nicholas is sent to the Caucasus, 5 S 5; sends an ultimatum to Bulgaria, 4 O 5; sends troops to Marseilles, 20 Ap 6; food riots in Petrograd, 9 Mh 7; the revolution begins, 12 Mh 7; the Tsar abdicates, 15 Mh 7; new Government recognised by the Allies, 24 Mh 7; M. Miliukoff resigns, 16 My 7; M. Kerenski becomes War Minister, 16 My 7; the Government repudiates a separate Peace, 19 My 7; launches a great offensive in E. Galicia, 1 Jl 7; proclaims a republic, 15 S 7 (_see_ Kerenski); a _coup d'état_ by Bolshevists, 7 N 7 (_see_ Lenin); negotiates at Brest-Litovsk, 2 D 7; the General Staff surrenders, 3 D 7; the Ukrainians revolt, 8 D 7 (_see_ Ukraine); the Constituent Assembly meets, 11 D 7; is dispersed by Bolshevists, 13 D 7; who sign an armistice at Brest-Litovsk, 15 D 7; and open Peace negotiations, 22 D 7; but denounce Germany's conditions, 2 Ja 8; the Constituent Assembly meets again, 18 Ja 8; is dissolved, 19 Ja 8; Trotsky announces that Russia is out of the war, 10 F 8; the Bolshevists defeat Gen. Alexeieff, 13 F 8; the armistice terminates, 18 F 8; Germany's terms are accepted, 24 F 8; Peace is signed at Brest-Litovsk, 2 Mh 8; the British Embassy is attacked, 29 Au 8 Saarbrücken, air-raids on, 6 S 5, 25 O 7, 16 My 8 Saarburg captured by French, 18 Au 4 Saillisel captured by French, 12 N 6 Sailly-Saillisel captured by French, 18 O 6 St. Denis Westrem, air-raids on, 3 Je 7, 27 S 7 St. Eloi, the Battle of, 14-17 Mh 5; British success at, 27 Mh 6, 3 Ap 6; a German success at, 7 Ap 6; a British success at, 9-10 Ap 6 St. Julien stormed by Germans, 24 Ap 5; captured by British, 31 Jl 7; retaken by Germans, 1 Au 7; by British, 3 Au 7 St. Mihiel captured by Germans, 23 S 4; a German success at, 6 Jl 5; the Battle of, 12-13 S 8 St. Nazaire, British base established at, 30 Au 4 St. Pierre Divion captured by British, 13 N 6 St. Pierre Vaast Wood captured by British, 16 Mh 7 St. Quentin retaken by French, 1 O 8 Saliff captured by British, 12 Je 7