In 1939 the Soviet Union and Nazi Germany signed a non aggression pact and agreed a division of Europe. To claim their spoils the Soviet Union launched an invasion of Finland. But the Finns were well prepared for a guerrilla war. One of their most prominent combatants was Simo Hayha who averaged over five kills per day, including the Soviet snipers who were hunting him, until he was wounded in the final days of of the war.
—David Foss