The submarine threat meant that many destroyers spent their time on anti-submarine patrol; once Germany adopted unrestricted submarine warfare in January 1917, destroyers were called on to escort merchant convoys.
Once Germany adopted unrestricted submarine warfare in January 1917, destroyers were called on to escort merchant convoys. The submarine threat meant that many destroyers spent their time on anti-submarine patrol.
The submarine threat meant that many destroyers spent their time on anti-submarine patrol. Once Germany adopted unrestricted submarine warfare in January 1917, destroyers were called on to escort merchant convoys.
The submarine threat meant that many destroyers spent their time on anti-submarine patrol. Once Germany adopted unrestricted submarine warfare in January 1917, destroyers were called on to escort merchant convoys.