On the 24th of May a Royal Marine Quickfiring Regiment was projected to man 12-pounder naval guns in an anti-tank role in an attempt to stop the German panzers. The first battery was formed from the R.M. detachments of H.M.S. Effingham:, recently sunk off Norway, which marched into barracks that afternoon, the remainder from the Land Defence Force of M.N.B.D.O. (I). British troops prepare a QF 12-pounder Naval gun mounted on a Albion BY-series truck at Fort Horsted as part of