Complex sentence: He appears to have abducted and had sexual intercourse with two high-born Danish women, which caused a war in which the Danish king Sweyn III of Denmark intervened in Småland in 1153-1154.
Split into simpler sentences: He appears to have abducted and had sexual intercourse with two high-born Danish women. These incidents caused a war in which the Danish king Sweyn III of Denmark intervened in Småland in 1153-1154.