Complex sentence: A report arrived that the commanding ground around Reutel had been captured and many Germans shot while fleeing but the advance had been held up at Juniper Cottage and that German guns in a gap near Judge Copse were holding up the infantry.
Split into simpler sentences: A report arrived that the commanding ground around Reutel had been captured and many Germans shot while fleeing. The advance had been held up at Juniper Cottage and German guns in a gap near Judge Copse were holding up the infantry.