Complex sentence: The 8th Division was subsequently dispatched to Singapore in February 1941, while a Militia battalion would be stationed between Port Moresby and Thursday Island, an AIF battalion would garrison Rabaul, and another brigade would be dispersed piecemeal in Timor and Ambon.
Split into simpler sentences: The 8th Division was subsequently dispatched to Singapore in February 1941, while plans were made for a Militia battalion to be stationed between Port Moresby and Thursday Island. An AIF battalion was also allocated to garrison Rabaul, and another brigade would be dispersed piecemeal to Timor and Ambon.