Complex sentence: The 199th Brigade, moved into the front line to replace 3rd Australian Division on 5 October but the relief was badly mismanaged, leading to the Australian staff officers, seriously doubting the efficiency of the 66th Division.
Split into simpler sentences: The 199th Brigade, moved into the front line to replace 3rd Australian Division on 5 October. The relief was badly mismanaged, leading to the Australian staff officers, seriously doubting the efficiency of the 66th Division.