Jan Karski

Jan Karski was a Polish soldier, resistance-fighter, and diplomat during World War II. He is known for having acted as a courier in 1940–43 to the Polish Government-in-Exile and to Poland's Western Allies about the situation in German-occupied Poland. He was reporting about the state of Poland, in which there were many competing factions in the resistance, and also about Germany's destruction of the Warsaw Ghetto and its operation of extermination camps on Polish soil that were murdering Jews, Poles, and others.