The Zeebrugge raid / Philip Warner.

"On 23 April 1918 a force drawn from the Royal Navy and Royal Marines launched one of the most daring raids in history. The aim was to block the Zeebrugge Canal, thereby denying U-boat access, although this meant assaulting a powerfully fortified German naval base. The raid has long been recognized for its audacity and ingenuity but, owing to the fact that the official history took overmuch notice of the German version of events, has been considered only a partial success."--Provided by the publisher.