Rukunin ya sauka a kan rairayin bakin teku na Normandy a watan Yuni 1944 kuma ya yi yaƙi a matsayin wani ɓangare na 79th Armored Division a duk lokacin yakin Normandy da yakin da ya biyo baya a Arewa maso Yammacin Turai
har zuwa karshen yakin a Turai a watan Mayu 1945.