Well, yes they did. British "help" was absolutely insignificant in 1942 and that is the year the Germans were done in Russia. by December they were done and the blitzkrieg tide had turned, the eastern front was done. That is when a flurry of assassination attempts started on Hitler, because military knew they were cooked and tried to preserve what could be saved. That is also when the "Allied" powers started gaining more interest in the outcome. Cooked. Done, Dec 1942.