You can read the obituary of John Wiernicki here.
This headline is on a news story about Wiernicki’s recent death:
Janusz Mikolaja Strojnowski (John Wiernicki), Holocaust survivor and architect: born Sarny, Poland (now Ukraine) 28 July 1925; married Anne Macander (died 2015; two sons); died Bethesda, Maryland 17 July 2015.
This quote is from the news article about Wiernicki’s death:
He [Wiernicki] was a cadet at military school and was 14 when Germany invaded his country [Poland]. He fled into the forests with a band of older cadets and for the next four years fought in guerrilla units, launching hit-and-run attacks.
He was captured by the [German] Gestapo in a mass round-up in 1943 at a railway station and sent to Auschwitz for having false identification papers. Had the Gestapo known he was a partisan fighter, [illegal combatant] he would doubtless have been shot.
Shortly before Auschwitz was liberated [on Jan. 27, 1945], Wiernicki was transferred to Buchenwald in Germany. He escaped while being marched to yet another camp, and was not yet 20 when Germany surrendered.
Wars are fought on the battlefield, unless you are fighting against Germany. Then it is O.K. to fight as an illegal combatant, or partisan.