The Battle of Wizna, fought 7–10 September 1939 during Germany’s invasion of Poland, saw ~720 Polish soldiers under Captain Władysław Raginis face ~42,000 Wehrmacht troops led by General Heinz Guderian. Despite overwhelming odds, they defended a fortified line for three days without rest or sleep. Raginis vowed to fight to the death, and as defeat loomed, he ordered his men to surrender before taking his life with a grenade. Often called the "Polish Thermopylae," Wizna echoes the 300 Spartans’ s