Above: "Bofors 40mm gun - anti-aircraft autocannon designed in 1930s by the Swedish arms manufacturer AB Bofors. displayed in Jyväskylä, Finland, on Harju ridge as a reminder of Winter War and World War 2." | 15 February 1940: The Winter War; the Soviet army breaks through the Mannerheim Line in Finland. (photo licensed to War History Network)  |   Video: The Winter War; Finland and Russia

Above: Finnish World War II defense line on the Karelian Isthmus. (photo licensed to War History Network)