Not Rated | 1h 57min | Drama, War | 1945 Many World War II films from the 1940s and ’50s—at least those set in the overseas theaters of war—follow a pattern: focusing on external events with little insight into what the main characters are thinking and feeling. With his “Walk in the Sun,” director Lewis Milestone (“All Quiet on the Western Front,” “Of Mice and Men”) offers up a different kind of war movie. Released in 1945, just after World War II ended, the focus is on one of the many U.S. Army platoons charged with the initial amphibious assault on Italy (the 1943 Allied Invasion of Italy). The opening scenes include an unusual tapestry of filmmaking styles. It begins with each of the platoon’s main characters being introduced via turning pages of a storybook, with brief descriptions of them delivered through excellent narration supplied by Burgess Meredith. Next, we’re …