Complex sentence: The years that led up to the formation of Education for All Handicapped Children Act of 1975 were marked by strife in the United States, from the assassination of John F. Kennedy in 1963 to the Vietnam war ongoing from 1955 until 1975.
Split into simpler sentences: The years that led up to the formation of Education for All Handicapped Children Act of 1975 were marked by strife in the United States. The assassination of John F. Kennedy in 1963, the Vietnam war was ongoing from 1955 until 1975.