Serbia – Battle of Paracin (until October 23): Serb First Army attacks strong counter-attacking German rearguards in Upper Morava valley. Serb Second Army relieves French at Pristina before advance to Western Morava valley via Kossovo.
Flanders: ALL BELGIAN COAST IN ALLIED HANDS, Belgian Northern wing on Dutch frontier.
Selle - Second phase (until October 22): British storm Hermann line and extend advance to north (until October 25); Third Army (7 divisions) crosses Selle (4 tanks in support) and captures Solesmes. US 27th and 30th Divisions withdrawn to rest (11,500 casualties since September 27).
Lorraine: Foch directs Petain to prepare to launch offensive as latter requested (October 14).
Meuse and Argonne: US losses now 54,158 men.
Urals: Heavily-mauled Czech 4th Regiment mutinies, 1st Regiment soon follows.
Germany: ALL U-BOATS ORDERED HOME by Scheer (17 boats recalled), coastal submarine UB-86 last outward bound boat to cross Northern Barrage for Irish Sea.
Channel: Royal Navy monitor M21 strikes 2 mines off Ostend, towed back to Dover but sinks.
Germany: Third note accepts US conditions (of October 14) including renunciation of U-boat war (Washington receives on October 22).
Denmark: Government proposes Schleswig-Holstein plebiscite.
Turkey: General amnesty to exiles and refugees; part of Izzet Pasha Government programme read to Assembly (October 19). Press meet and agree to act together (October 21).