Complex sentence: Another British attack came on 24 August as Infantry Regiment 88 from the 56th Division began to relieve Infantry Regiment 121 and Gremadier Regiment 119 which required every man left in the regiment to withstand and caused the loss of more than and twelve machine-guns.
Split into simpler sentences: Another British attack came on 24 August as Infantry Regiment 88 from the 56th Division began to relieve Infantry Regiment 121 and Gremadier Regiment 119. Every man left in the regiment was needed to withstand the attack which caused the loss of more than and twelve machine-guns.