Complex sentence: At the commander of the 6th/7th Royal Scots Fusiliers the 45th Brigade reserve battalion, took over in the sector and organised more counter-attacks by bombing parties, as other groups from the 46th Brigade area to the right joined in.
Split into simpler sentences: At the commander of the 6th/7th Royal Scots Fusiliers (RSF) the 45th Brigade reserve battalion, took over in the sector. Organised counter-attacks by bombing parties from the 6th/7th RSF began and other groups from the 46th Brigade area to the right joined in.