Complex sentence: The restored regime of Haile Sellasie approached the United Nations in 1948 to have him tried for war crimes, along with nine others; however, the UN commission agreed to call him as a witness only.
Split into simpler sentences: The restored regime of Haile Selassie I approached the United Nations in 1948 to have him tried for war crimes, along with nine others. However, the UN commission agreed to call him as a witness only.