The Continuation War, also known as the Second Soviet-Finnish War, was a conflict fought by Finland and Nazi Germany against the Soviet Union during World War II. It began with a Finnish declaration of war on 25 June 1941 and ended on 19 September 1944 with the Moscow Armistice. The Soviet Union and Finland had previously fought the Winter War from 1939 to 1940, which ended with the Soviet failure to conquer Finland and the Moscow Peace Treaty. Numerous reasons have been proposed for the Finnish decision to invade, with regaining territory lost during the Winter War regarded as the most common. Other justifications for the conflict include Finnish President Risto Ryti's vision of a Greater Finland and Commander-in-Chief Carl Gustaf Emil Mannerheim's desire to annex East Karelia.
The Karelian Isthmus is the approximately 45–110-kilometre-wide (30–70 mi) stretch of land situated between the Gulf of Finland and Lake Ladoga in northwestern Russia, to the north of the River Neva. Its northwestern boundary is a line from the Bay of Vyborg to the westernmost point of Lake Ladoga, Pekonlahti. If the Karelian Isthmus is defined as the entire territory of present-day Saint Petersburg and Leningrad Oblast to the north of the Neva and also a tiny part of the Republic of Karelia, the area of the isthmus is about 15,000 km2 (5,800 sq mi).
The Finnish Army is the land forces branch of the Finnish Defence Forces. The Finnish Army is divided into six branches: the infantry, field artillery, anti-aircraft artillery, engineers, signals, and materiel troops. The commander of the Finnish Army since 1 January 2022 is Lieutenant General Pasi Välimäki.
The 6th Division was a unit of the Finnish Army during the Continuation War. Subordinated to the German XXXVI Corps, the division took part in the German-led Operation Arctic Fox in 1941. In 1943, the division was moved to Eastern Karelia, from where it was moved to the Karelian Isthmus following the start of the 1944 Soviet Vyborg–Petrozavodsk offensive. Following the Moscow armistice, the division also took part in the Lapland War against the German forces remaining in Finnish Lapland.
The 289th Rifle Division was an infantry division of the Soviet Union's Red Army, formed twice. The division was first formed in the summer of 1941, after the German invasion of the Soviet Union, and was sent to the front and destroyed in the Battle of Kiev in September. The division was formed a second time in October 1941 from the 5th Rifle Brigade, a separate infantry brigade fighting in the Continuation War against Finnish and German troops in Karelia. The new division spent most of the war in Karelia and in the summer of 1944 fought in the Vyborg–Petrozavodsk Offensive, which resulted in the end of the Continuation War in September. The division was stationed at Belomorsk in Karelia until its disbandment after the end of World War II in July 1946.
The Vyborg–Petrozavodsk offensive or Karelian offensive was a strategic operation by the Soviet Leningrad and Karelian Fronts against Finland on the Karelian Isthmus and East Karelia fronts of the Continuation War, on the Eastern Front of World War II. The Soviet forces captured East Karelia and Vyborg/Viipuri. After that, however, the fighting reached a stalemate.
The Battle of Tienhaara was a part of Continuation War between Finland and the Soviet Union fought north of Viipuri on June 22, 1944, after the Red Army had captured Viipuri. Having lost Viipuri Finns concentrated their defense to the Tienhaara region which offered favourable area for defense with nearby waterway cutting the already narrow battlefield into several islands.
The Finnish invasion of the Karelian Isthmus refers to a military campaign carried out by Finland in 1941. It was part of what is commonly referred to as the Continuation War. Early in the war Finnish forces liberated the Karelian Isthmus. It had been ceded to the Soviet Union on 13 March 1940, in the Moscow Peace Treaty, which marked the end of the Winter War. Later, in the summer of 1944, the Soviet Union reconquered the southern part of the isthmus in the Vyborg–Petrozavodsk Offensive.
The 23rd Army was a Field Army of the Soviet Union's Red Army.
The Battle of Tali–Ihantala was part of the Finnish-Soviet Continuation War (1941–1944), which occurred during World War II. The battle was fought between Finnish forces—using war materiel provided by Germany—and Soviet forces. To date, it is the largest battle in the history of the Nordic countries.
The Finnish 61st Infantry Regiment (IR61) was a combat regiment of the 17th division of the Finnish Army during the Second World War, consisting almost exclusively of Swedish-speaking Finns. Among others, the regiment participated in the battle of Tienhaara. The regiment has been the subject of several books, as well as a feature film Beyond the Front Line. In 1980, Lieutenant general A. E. Martola opined: "Honestly, this regiment saved Finland during the midsummer weekend 1944, even if only temporarily."
The 142nd Rifle Division began service in August 1939 as a standard Red Army rifle division, which participated in the Winter War against Finland. It remained on the Karelian Isthmus and had a relatively uneventful war facing the Finns until the Vyborg–Petrozavodsk Offensive began on June 10, 1944, from which point it saw much more active service. Following the end of the Continuation War, the division was transferred to 2nd Shock Army in 2nd Belorussian Front. Its soldiers distinguished themselves in the capture of the German city of Graudenz and ended the war fighting through Pomerania.
Antero Johannes Svensson was a Finnish major general, a member of the Jäger Movement and a recipient of the Mannerheim Cross. He participated in the Eastern Front of World War I as a volunteer of the 27th Royal Prussian Jäger Battalion, in the Finnish Civil War as a platoon and squadron commander, the Winter War as a brigade and division commander, and the Continuation War as a division and corps commander.
The Battle of Porlampi, also known as the Battle of Porlammi, was a military engagement fought between the Finnish Army and Red Army from 30 August to 1 September 1941 on the Karelian Isthmus. The battle was fought near the town of Porlampi during the second month of the Continuation War. The battle was a Finnish victory and effectively ended the reconquest of Karelia.
The 368th Rifle Division was raised in 1941 as a standard Red Army rifle division, and served for the duration of the Great Patriotic War in that role. It began forming in August 1941 in the Siberian Military District. After forming, it remained in the reserves of that district until March 1942, when it was assigned to the 7th Separate Army in Karelia, where it remained until mid-1944. The division had a mostly uneventful war on this defensive front, but then took part in the offensive that drove Finland out of the war in the summer of that year, being awarded the Order of the Red Banner for its services. It later saw action against the German forces trying to hold northern Finland. The division ended the war in the Belomorsky Military District on garrison duties in the Soviet Arctic.
The 13th Light Tank Brigade was an armored brigade of the Red Army that fought in the Winter War. It was formed as the 31st Uritsky Mechanized Brigade in 1932 at Stary Petergof near Leningrad, assigned to the 11th Mechanized Corps, one of the first armored units of the Red Army. Two years later, the brigade became part of the new 7th Mechanized Corps, and it sent crews to fight in the Spanish Civil War. When the corps was redesignated as the 10th Tank Corps, the brigade became the 13th Light Tank Brigade in 1938. In late 1939, it and the corps participated in the massing of forces on the Estonian and Latvian borders to force their governments to agree to Soviet demands.
The II Corps was a unit of the Finnish Army during the Continuation War. During the war the corps participated in combat first northwest of Lake Ladoga and on the Karelian Isthmus before moving to the Povenets–Lake Segozero region by late 1941. During the Soviet offensive of 1944, the corps conducted a fighting retreat to the region of Ilomantsi, with parts of its forces participating in the subsequent Battle of Ilomantsi.
The IV Corps was a unit of the Finnish Army during the Continuation War. During the 1941 Finnish invasion of the Karelian Isthmus, it encircled three Soviet divisions in the area south of Vyborg before being renamed as Isthmus Group.
The V Corps was a unit of the Finnish Army during the Continuation War of 1941–1944. It was first active for a brief time in 1941, and was reactivated in 1942 in the Svir sector during the trench warfare phase of the war. Following the Soviet Vyborg–Petrozavodsk offensive, the corps was moved to the Karelian Isthmus, where it fought in the Battle of Vyborg Bay, stopping a Soviet amphibious operation to cross the Vyborg Bay.
The 2nd Division was a unit of the Finnish Army during the Continuation War. It participated in the Finnish invasion of Ladoga Karelia at the start of the war and defended against the 1944 Soviet Vyborg–Petrozavodsk offensive on the Karelian Isthmus where it suffered heavy casualties.
Finland 
Soviet Union