Süd was advancing east and northwest in the course of Nazi-Soviet invasion of Poland. Enemy forces in front of the Korps divided into two parts: Northern & Southern. The northern part was withdrawing across the San River into the woods around Zaklikow and Biłgoraj, last time spotted on the Janów – Frampol road. On September 14, 1939 the Polish Armoured Train Nr. 51 ("Marszałek I"), while covering the retreat of Polish forces near the village of Zaklików, the train managed to delay the advance of the German 4th Infantry Division units until the next day and prevented the Polish 94th Inf. Rgt. from being cut off from the Polish main forces. Sometime in 1942, 20 partisans led by Gregori Korchinski, most of them Jews fighting against the Nazis in Poland, moved to the Zaklików area and set up a partisan base in the village of Ludmilovka. They recruited additional 15 local men. Among the Jews, there were unified groups commanded by Yaacov Freitag and Reuven Pintel. The Holocaust Germans occupied Zaklikow in mid September 1939 and immediately burned down the Jewish residential area and forced the Jewish population to assemble, killing several at random. Afterwards, they robbed and plundered the Jewish community and conscripted many for forced labor. There was a small forced labor camp for Jews in the nearby village of Lysaków. In 1941, Zakilow became a destination for Jews in surrounding areas who had been forced to leave their own towns by the Nazi SS and Police Chief of Lublin in cooperation with the "Sub-Department of Population and Welfare" of the Governor of the district of Lublin, on the proposal of the local authorities. Officer Lenk, a subordinate of the District Chief of Janów-Lubelski, wrote to the SS-and-Police-Chief of Lublin asking for deportation of local Jews to a different locations in Poland. Zaklikow was mentioned with 1,500 Jews to be "evacuated". Around October 15, 1942, the SS and their Ukrainian auxiliaries and the local police gathered all Jews in the marketplace. Hundreds, mostly children and the aged and ill, were murdered on the spot. The rest were taken to Belzec where they were immediately murdered. Two hundred or so had hidden from the roundup. After this, those who hid reemerged and Jews from other towns were forcibly brought to the ghetto including the entire Jewish population of the nearby town of Janów Lubelski, which included a few hundred