Woodrow Wilson delayed the armistice because he was in secret negotiations with the Germans, leading them to think they were getting a better deal and unconditional surrender, based on his famous 14-points. In fact, The Treaty of Versailles was so bad it virtually guaranteed World War Two.
The full story of this debacle may be found in Charles L. Mee, Jr’s book, which I reviewed here.
As a Matter of Fancy 