'Sho 2' was the Japanese plan within 'Sho' for the strategic defence of Formosa and the Ryukyu islands group (summer 1944)., Now known as Taiwan, Formosa is a large island wit... Read More

'Sho 3' was the Japanese plan within 'Sho' for the strategic defence of Kyushu and Honshu islands in the Japanese home islands (summer 1944). , The plan was ready at the end o... Read More

'Sho 4' was the Japanese plan within 'Sho' for the strategic defence of Hokkaido island and the Kurile islands group (summer 1944)., The plan was ready for implementation at t... Read More

'Shoestring' was a US airborne operation to drop 1,830 men of the 511th Parachute Infantry and 457th Field Artillery Battalion to take and hold Tagaytay Ridge on Luzon island ... Read More

'Shoestring II' was the US seizure of Cape Torokina within the 'Cherryblossom' landing at Empress Augusta Bay on the western side of Bougainville island in the Solomon islands... Read More

'Shoot' was a British series of nine undertakings by the Special Boat Squadron, with the aid of light vessels, in support of Allied raiding operations on the islands off the c... Read More

'Shotgun' was a British unrealised deception plan by the London Controlling Section, the UK-based British deception arm, to create and leak to the Germans a forged document ex... Read More

'Shrapnel' was a British unrealised plan for the seizure of the Cape Verde islands group, a Portuguese possession off the west coast of Africa, should Germany invade the Iberi... Read More

'Shred was a British naval minelaying and minesweeping operation, including the subordinate 'Groundsheet' (i) and 'Winner' efforts, off the coast of German-occupied Norway (21... Read More

'Shrubbery' was a British unrequired plan for the defence of Syria and Iraq in the event of a German advance into the region after a successful campaign in the southern USSR a... Read More

'Shuttlecock' was a British unrealised plan for the seizure of the Azores islands group, a Portuguese possession in the Atlantic Ocean, in the face of German opposition (1941/... Read More

'SHX' was the designation of Allied convoys (together with a numerical suffix) from Sydney, Newfoundland, to join 'HX' convoys (July 1940/August 1941). , These first of these ... Read More

The 'Siauliai Offensive Operation' was a Soviet undertaking by General Hovhannes Kh. Bagramyan’s 1st Baltic Front within the third phase of the 'Belorussian Strategic Offens... Read More

'Siberien' was a German rendezvous location in the Indian Ocean between Mauritius and Australia where a number of Hilfkreuzer (auxiliary cruiser) surface raiders could meet th... Read More

'Sichelschnitt' was the German nickname rather than formal codename for the definitive strategic offensive through the Netherlands, Belgium and Luxembourg into north-eastern F... Read More

'Sickle' (i) was the British landing at Åndalsnes to the south of Trondheim in Norway in the aftermath of the German 'Weserübung' (18 April 1940)., The undertaking was the s... Read More

'Sickle' (ii) was the Allied overall designation of the US build-up of air power in the UK for the Allied air offensive against Germany within the overall context of 'Bolero' ... Read More

The 'Siege of Dunkirk' was the Canadian investment by units of Major General Major General C. Foulkes’s Canadian 2nd Division of General H. D. G. Crerar’s Canadian 1st Arm... Read More

The 'Siege of Mogilev Operation' was the Soviet unsuccessful defence of the city of Mogilev during the early stats of the German 'Barbarossa' invasion of the USSR (3/26 July 1... Read More

'Siegfried' (i) was the German seizure of the island of Hiiumaa (Dagö in German) off the coast of Estonia at much the same time as 'Beowulf' to take Saaremaa and Muhu (12/21 ... Read More

'Siegfried' (ii) was the German original designation of the trio of summer offensives of 1942 on the Eastern Front, later retitled 'Blau I', 'Blau II' and 'Blau III' (28 June/... Read More

'Siegfried' (iii) was the German unrealised baseline plan for the occupation, within 'Achse' (ii), of those portions of southern France held by Generale d’Armata Mario Verce... Read More

'Siegfried' (iv) was a U-boat wolfpack operation in the central part of the North Atlantic against the ON.207 and HX.262 convoys (11/16 January 1942). , This small wolfpack co... Read More

'Siegfried' (v) was a U-boat wolfpack operation in the Atlantic (24/27 October 1943)., The wolfpack comprised U-91, U-212, U-226, U-231, U-267, U-281, U-309, U-373, U-405, U-4... Read More

The 'Siegfried-Linie' was the German major defence line in the west of Germany, essentially a counterpart to the French 'Ligne Maginot' but constructed to slightly more modern... Read More

'Siena' was an Italian convoy operation from Crete to North Africa (8/10 July 1942)., The convoy of five merchant ships departed Souda Bay for Tobruk under escort of the Itali... Read More

'Siesta' was a British unrealised and Canadian offensive against the German forces holding the Nijmegen salient to the south of Arnhem in the German-occupied Netherlands along... Read More

'SIGSALY' was an Allied maximum-security speech communications system that was otherwise known as the 'X System', 'Project X', 'Ciphony I' and 'Green Hornet' (1943/46)., 'SIGS... Read More

The 'Sigulda-Stellung' was the German defence line, otherwise known as the 'Segewold-Stellung', behind the outer 'Wenden-Stellung', in Latvia for the protection of Riga agains... Read More

'Silberfuchs' was a joint German and Finnish three-part operation, known to the Finns as 'Hopeakettu', during the 'Jatkosota' continuation war on the Eastern Front against the... Read More

'Silberstreif' was a German unrealised naval operation to operate heavy warships against British merchant vessels proceeding independently through the Arctic Ocean and Norwegi... Read More

'Silberstreif' (ii) was the German overall designation for its localised propaganda operation against the USSR using air-dropped leaflets in an attempt to persuade Soviet troo... Read More

'Silberstreife' (i) was the German overall designation of naval and air operations planned for implementation against the Allies' Arctic convoys delivering supplies to norther... Read More

'Silberstreife' (ii) was a German attack on the Yugoslav IV Corps of Marshal Josip Broz Tito’s partisan forces in German-occupied Yugoslavia as part of 'Panther' (viii) to s... Read More

'Silenzio' was a British special forces operation to parachute a three-man team of the 1st Special Force into the Gova area of German-occupied Italy to establish links with lo... Read More

'Silver A' was a British and Czechoslovak special forces operation to parachute a three-man team into the Kolin area to establish liaison with the resistance forces in German-... Read More

'Silver B' was a British and Czechoslovak special forces communications mission to parachute a two-man team into the Plzeň area to support 'Silver A' in German-occupied Czech... Read More

'Silverplate' was the US overall designation of the USAAF’s participation in the 'Manhattan' project, initially in regard to the modification of Boeing B-29 Superfortress bo... Read More

'Silvertip' was the designation of Allied military ferry convoys (together with a numerical suffix) plying the route from Newhaven on the south coast of the UK to Dieppe on th... Read More

'Simon' was an Allied special forces operation to parachute a three-man British and French 'Jedburgh' team into the Vendée area of the German-occupied Netherlands (28 Septemb... Read More

'Sinbad' was the Allied build-up of air strength in Admiral the Lord Louis Mountbatten’s South-East Asia Command in preparation for 'Zipper' and 'Tiderace' (summer/autumn 19... Read More

'Siren Tour' was the British overall designation for any air raid undertaken by small numbers of bombers against German targets with the major objects of causing air raid alar... Read More

'Sirio' was an Italian convoy operation from ports of southern Italy to Tripoli in North Africa with reinforcements, weapons, ammunition and other supplies for the Axis forces... Read More

'Sirocco' was a British naval gunfire attack on coastal targets in German-occupied Belgium and the Netherlands (January 1943). ... Read More

'Sisak' was a Croat operation against the partisan forces of Marshal Josip Broz Tito in the northern part of the puppet state of Croatia within German-occupied Yugoslavia (23 ... Read More

'Siskin' was a British operation by the Special Operations Executive to train resistance groups in the Sogn area of German-occupied Norway, especially at important power stati... Read More

'Sitka' was the Allied amphibious landing on and seizure of Port Cros and Levant, two of the Iles d’Hyères between Toulon and Cannes off the south coast of German-occupied ... Read More

'Sixth Enemy Offensive' was the Yugoslav designation for the series of German and Croat operations, centred on 'Schneesturm' and 'Kugelblitz' (ii), undertaken against the part... Read More

'Sizilien' was the German alternative designation for 'Zitronella' (6/9 September 1943). ... Read More

'SJ' (i) was the designation of Allied convoys (together with a numerical suffix) plying the route from San Juan, Puerto Rico, to Guantánamo, Cuba (1942). ... Read More