Complex sentence: When the light horse regiments were sent to Gallipoli as reinforcements following the initial landing, Verge was attached to the 1st Australian Division, landing on 20 May, just after the failed Turkish attack on Anzac Cove.
Split into simpler sentences: When the light horse regiments were sent to Gallipoli as reinforcements following the initial landing, Verge was attached to the 1st Australian Division. They landed on 20 May, just after the failed Turkish attack on Anzac Cove.