sentences:  The first draft of the plan was already completed in secret in October 1944 and was aimed against the Ardennes, mirroring the successful campaign in 1940 against France.The plan required for the best divisions of the Wehrmacht to be held back from the autumn fighting, to gain time to build them up for the planned offensive.For the successful execution of the plan, the holding of the Rur River line was deemed as absolutely important, to prevent the Allies from a flanking attack.