Complex sentence: Itagaki met his generals and senior staff at his HQ at the former Raffles College in Bukit Timah and told his men that they would have to obey the surrender instructions and keep the peace.
Split into simpler sentences: Itagaki met his generals and senior staff at his HQ at the former Raffles College in Bukit Timah. He told his men that they would have to obey the surrender instructions and keep the peace.