During the final fight between Cain and Todd, Todd breaks Cain's arm at the elbow and wrist. In the next shot Cain is staggering backwards as Todd winds up for another blow. You can clearly see that Cain's arm is fine and resting comfortably at his side.
When Sargent Todd's combat and military record appears on screen, just before the title "between wars" is shown, you can see his different decorations. They refer to Kurt Russell's acting roles: "Plissken patch" (from "Escape from New York/LA"), "McReady" ("The Thing"), "Cash Medal of Bravery" from "Tango and Cash", and "O'Neil Ring Award" from "Stargate" where he played Jack O'Neil.