Complex sentence: Nagy's most controversial decision took place on 1 November when he announced that Hungary intended to withdraw from the Warsaw Pact as well as proclaiming Hungarian neutrality he asked the United Nations to become involved in the country's dispute with the Soviet Union.
Split into simpler sentences: Nagy's most controversial decision took place on 1 November, when he announced that Hungary intended to withdraw from the Warsaw Pact as well as proclaiming Hungarian neutrality. He asked the United Nations to become involved in the country's dispute with the Soviet Union.