Berkeley took part in Salerno Landing in September 1943 as an observer with the 46th British Infantry Division under Major General John Hawkesworth. During the landing, his LVT came under German artillery fire and was forced to withdraw for repairs. Berkeley later had the opportunity to discuss the efficiency of naval gunfire support with Lieutenant General George S. Patton, the 7th U.S. Army commander. He later recalled General Patton's distaste for and distrust of naval gunfire support, a primary element for successful amphibious operations.