Catman #18

"The Little Leaders" story involves two young American children, Mickey and Katie, who encounter a mysterious burly Nazi figure concealed near their house and become entangled in espionage involving Japanese agents disguised as Chinese and hidden messages encoded in painted flowers. When Catman appears to assist them, the group must navigate underground Nazi tunnels while being pursued by Nazi forces and Major Streck's men, ultimately becoming trapped as Nazis close in on their position.