Complex sentence: The German defences opposite the 36th Division had been more severely damaged than those further south, the front line trenches were demolished, barbed wire swept aside and dug outs caved in, which caused the 9th Company of III battalion, Reserve Regiment 99 many casualties.
Split into simpler sentences: The German defences opposite the 36th Division, had been more severely damaged than those further south. Front line trenches were demolished, barbed wire swept aside and dug outs caved in, which caused the 9th Company of III battalion, Reserve Regiment 99 many casualties.