Complex sentence: In 1942, the house in which Kosciuszko was born and spent first 12 years of his life, was burned down by Soviet partisans, and after the war, the village remained in the Soviet Union.
Split into simpler sentences: In 1942, the house in which Kosciuszko was born and spent first 12 years of his life, was burned down by Soviet partisans. After the war, the village remained in the Soviet Union.