Complex sentence: Born and raised in Hungary, he participated as a teenager in the Hungarian Revolution of 1956 against the Soviet Union before escaping to America, where he received his higher education and became a scholar of Abraham Lincoln and the American Civil War.
Split into simpler sentences: Born and raised in Hungary, he participated as a teenager in the 1956 revolution against the Soviet Union. He escaped to America, where he received his higher education and became a scholar of Abraham Lincoln and the Civil War.