Complex sentence: Savige arrived in Australia on 5 January 1942 to find that his new appointment had been changed to commander of the 3rd Division, and he was promoted to the rank of major general two days later.
Split into simpler sentences: Savige arrived in Australia on 5 January 1942 to find that his new appointment was as commander of the 3rd Division. He was promoted to the rank of major general two days later.