Complex sentence: As the advance moved into the woods, small parties of British and German infantry stalked each other through trees, small quarries and trenches but the German defenders were overrun in about two hours; mopping up began but some German troops held out as dark fell.
Split into simpler sentences: As the advance moved into the woods, small parties of British and German infantry stalked each other through trees, small quarries and trenches. The German defenders were overrun in about two hours; mopping up began but some German troops held out as dark fell.