Complex sentence: Transported to Java, Netherlands East Indies in January 1942, he was then sent to Sumatra on 14 February, where he helped organise the evacuation of allied troops from Oosthaven.
Split into simpler sentences: Transported to Java, Netherlands East Indies in January 1942. He was then sent to Sumatra on 14 February, where he participated in the evacuation of allied troops from Oosthaven.