 Raymond took the war in Europe seriously enough to incorporate it into his strips , with Flash returning to Earth in the Spring of 1941 . Jungle Jim found himself involved in the conflict too , fighting in the U.S. Army . Raymond was becoming " restive about doing his duty " , a restlessness increased by the knowledge that four of his five brothers were already enlisted . In February 1944 , Raymond left King Features and his work on the Sunday Flash Gordon / Jungle Jim pages to join the US Marines , commissioned as a captain and serving in the public @-@ relations arm . Raymond is quoted as stating " I just had to get into this fight ... I 've always been the kind of guy who gets a lump in his throat when a band plays the ' Star Spangled Banner ' " . 
