July 11, 1943, is regarded as one of the bloodiest days of the massacres, with many reports of UPA (Ukrainian Insurgent Army) units marching from village to village, killing Polish civilians. On that day, UPA units surrounded and attacked Polish villages and settlements located in three counties The events began at 3:00am, with the Poles having no chance to escape. After the massacres, the Polish villages were burned to the ground. According to those few who survived, the action had been carefully prepared; a few days before the massacres there had been several meetings in Ukrainian villages, during which UPA members told the villagers that the slaughter of all Poles was necessary. Within a few days an unspecified number of Polish villages were completely destroyed and their populations murdered. In the Polish village of Gurow, out of 480 inhabitants, only 70 survived; in the settlement of Orzeszyn, the UPA killed 306 out of 340 Poles; in the village of Sadowa out of 600 Polish inhabitants only 20 survived; in Zagaje out of 350 Poles only a few survived.
