Complex sentence: Preston 1921, p.7 There were several horse trained troops in the region that had been evacuated from Gallipoli, belonging to the British yeomanry 2nd Mounted Division and Australian Light Horse units.
Split into simpler sentences: Preston 1921, p.7 At the time there were several horse trained troops in the region that had been evacuated from Gallipoli. They had previously been part of the British yeomanry 2nd Mounted Division and Australian Light Horse units.