High Quality Content by WIKIPEDIA articles! The QF 4-inch gun Mk IV was introduced in 1911 as a faster-loading light gun successor to the BL 4 inch Mk VIII gun. Mk IV armed many British destroyers and some cruisers in World War I. It was used to arm merchant ships in World War II. The Mk XII variant was developed for arming submarines from 1918, Mk XXII was developed to arm submarines during World War II. The Mk IV gun from HMS Lance which fired the first British shot of World War I on 5 August 1914 is on display at the Imperial War Museum, London.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.