Complex sentence: The Canterbury Mounted Rifles Regiment remained to guard the sick until transport was organised, when 100 sick walking cases were sent on to Amman in New Zealand Mounted Rifle Brigade transport wagons and the 2nd Light Horse Brigade commenced its return journey to Amman.
Split into simpler sentences: The Canterbury Mounted Rifles Regiment remained to guard the sick until transport was organised. One hundred sick walking cases were sent on to Amman in New Zealand Mounted Rifle Brigade transport wagons and the 2nd Light Horse Brigade commenced its return journey to Amman.