"Imperial War Museum Galleries at the Crystal Palace, 1920-1924" Imperial War Museum exhibit relating to the Zeebrugge Raid, 22-23 April 1918. One of two 7.5 inch howitzer Mk Is fitted to HMS Vindictive as a support weapon for bombarding German defences whilst an assault force of Royal Marines and officers and men of the Royal Navy landed on the sea mole at Zeebrugge.