vertical firing การใช้

• Works that could resist the horizontal fire of guns were still vulnerable to the vertical fire of mortars.
• Maximum combat vertical fire was 2, 500 m while the maximum vertical range was 6, 500 m.
• Soon afterwards appeared his " Trait?de l'attaque des places ", a revised and amplified edition of the older memoir of 1669, which contains the methods of the fully developed Vauban attack, the main features of which are the parallels, ricochet fire and the attack of the defending personnel by vertical fire.