The defense of Wizna against overwhelming odds lasted for three days. On September 10, 1939, the bunker commanded by Raginis was the last remaining pocket of resistance. Although heavily wounded, Raginis was still commanding his troops. At noon on the third day, the German commander, Heinz Guderian, threatened that all Polish POWs would be shot if the defense of the bunker did not cease. Turning to his men in the shelter, Raginis thanked them for their bravery, and for doing their duty. He then ordered them to surrender and leave the shelter - he would keep his word and not surrender. Seweryn Biegański, who was the last to leave the shelter, describes the moment;