Juho Henrik Heiskanen was a Finnish

Finland

Finland , officially the Republic of Finland, is a Nordic country situated in the Fennoscandian region of Northern Europe. It is bordered by Sweden in the west, Norway in the north and Russia in the east, while Estonia lies to its south across the Gulf of Finland.Around 5.4 million people reside...

 Major General

Major General

Major general or major-general is a military rank used in many countries. It is derived from the older rank of sergeant major general. A major general is a high-ranking officer, normally subordinate to the rank of lieutenant general and senior to the ranks of brigadier and brigadier general...

 during the World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

.

Heiskanen joined the Jaeger Movement

Finnish Jäger troops

The Jäger Movement were volunteers from Finland trained in Germany as Jägers during World War I. Supported by Germany to enable a Finnish sovereign state, it was one of many means by which Germany intended to weaken Russia and to cause Russia's loss of western provinces and...

 in 1915 and trained and fought in the Royal Prussian 27th Jäger Battalion. In 1916, he was arrested by Gendarmerie

Gendarmerie

A gendarmerie or gendarmery is a military force charged with police duties among civilian populations. Members of such a force are typically called "gendarmes". The Shorter Oxford English Dictionary describes a gendarme as "a soldier who is employed on police duties" and a "gendarmery, -erie" as...

 in Jyväskylä

Jyväskylä

Jyväskylä is the capital of Central Finland and the largest city on the Finnish Lakeland, north-east of Tampere and north of Helsinki, on northern coast of lake Päijänne. The city has been continuously one of the most rapidly growing cities in Finland since World War II. The city is surrounded...

 and sent to Petrograd. Heiskanen was released next year during the October Revolution

October Revolution

The October Revolution , also known as the Great October Socialist Revolution , Red October, the October Uprising or the Bolshevik Revolution, was a political revolution and a part of the Russian Revolution of 1917...

, and he returned to Finland. During the Finnish Civil War

Finnish Civil War

The Finnish Civil War was a part of the national, political and social turmoil caused by World War I in Europe. The Civil War concerned control and leadership of The Grand Duchy of Finland as it achieved independence from Russia after the October Revolution in Petrograd...

, Heiskanen fought for the Whites

White Guard (Finland)

The White Guard was a voluntary militia that emerged victorious over the socialist Red Guard as part of the Whites in the Finnish Civil War of 1918...

.

Heiskanen commanded the IV Corps

Finnish IV Corps (Winter War)

The IV Corps was a formation of the Finnish Army during the Winter War against the Soviet Union. It defended the area north of Lake Ladoga against Soviet attacks. It was commanded by Major General Juho Heiskanen and from 4 December 1939 by Major General Woldemar Hägglund...

 during first days of the Winter War

Winter War

The Winter War was a military conflict between the Soviet Union and Finland. It began with a Soviet offensive on 30 November 1939 – three months after the start of World War II and the Soviet invasion of Poland – and ended on 13 March 1940 with the Moscow Peace Treaty...

. Heiskanen was removed from the office by C.G.E. Mannerheim

Carl Gustaf Emil Mannerheim

Baron Carl Gustaf Emil Mannerheim was the military leader of the Whites in the Finnish Civil War, Commander-in-Chief of Finland's Defence Forces during World War II, Marshal of Finland, and a Finnish statesman. He was Regent of Finland and the sixth President of Finland...

 due to failures. During the Continuation War

Continuation War

The Continuation War was the second of two wars fought between Finland and the Soviet Union during World War II.At the time of the war, the Finnish side used the name to make clear its perceived relationship to the preceding Winter War...

, Heiskanen was the Commandant of Viipuri, and the General Inspector of the Military Training.