Shamrock there isn't a particularly big troop presence around Northumberland but there is the Otterburn ranges. Where most of the live firing of the AS90's and MLRS's takes place. The large concentration of troops in the North East is at Catterick where the majority if not all the infantry training takes place now, not only that but there are active units based there as well. It was and I think still maybe the largest army base in Europe, definatley the largest in the UK.