Jonas Misiūnas also known by his codename Žalias Velnias (green devil) (15 January 1911 – 11 March 1947) was a commander of the anti-Soviet Lithuanian partisans and the founder of the Didžioji Kova military district.

During World War II, he worked in railway security and volunteered for the short-lived Lithuanian Territorial Defense Force.

Misiūnas was arrested when he attended a meeting of partisan leaders (a trap organized by NKVD agents) in Vilnius in August 1946.

[2][3] Misiūnas was born in Valmoniai [lt] near Pušalotas in the present-day Panevėžys District Municipality into a family of a blacksmith.

[4] On 5 February 1944, he volunteered for the Lithuanian Territorial Defense Force, a Nazi-sponsored military unit commanded by general Povilas Plechavičius.

[5][3] In early July 1944, as the Red Army approached Lithuania, Misiūnas started organizing men near Musninkai to fight against the Soviets.

[6] Under Misiūnas, voters voting in favor of the USSR in state-sponsored elections and then attempting to join the partisans were to be shot.

His wife Ona-Vida Misiūnienė (née Krivickaitė) and their seven-year old twins Kęstutis and Rimgaudas were arrested on 5 January 1945.

Markulis recommended Viktoras Pečiūras-Kapitonas Griežtas (agent Gediminas), who was made the official commander of the district on 16 July 1946.

He posed himself as a representative of a non-existent "central committee", and promised to provide the partisans with fraudulent documents for them to live "legally", and as such demanded their signatures with pictures, as well as ordered them to put their weapons in special warehouses, only to be used in certain situations.

Agent Gediminas also offered Misiūnas to travel abroad in the United Kingdom to study war strategy.