11. A semicircle of field fortifications was created. 12. Engineer stores were rushed forward to repair captured caves, quarry entrances and field fortifications . 13. The vast majority of the Mannerheim Line was merely composed of trenches and other field fortifications . 14. The material effect depends on circumstances, as well-covered field fortification provide much protection. 15. Both places were surrounded by field fortifications and Gallabat was held by a colonial infantry battalion. 16. Poles attempted to regroup at the heavily fortified line of German World War I field fortifications . 17. They were also used against field fortifications , for clearing minefields and for breaching barbed wire. 18. The gun was intended for destruction of light field fortifications and openly placed personnel by direct fire. 19. Defensive positions ran the gamut-from imposing castles, to field fortifications with trenches and ramparts. 20. That Fort & Bridge form one of the best and strongest field fortifications ever erected against Indians ."
