There was an Armistice. I don't recall that any foreign soldiers ever set foot in Germany. The War was a draw, but they lost the peace. If you'll recall, the U.S. president wasn't exactly approving of the terms, especially considering how much he risked to get involved.
Not true; Germany had used up all of its reserve strength during the 1918 Ludendorff Offensive and was in general retreat in the West as the Allies mounted the final counteroffensive. The Germans lost the war, primarily as the mounting effect of the new US troops began to take effect. The Germans faced mutiny with the High Seas Fleet and approaching revolution at home.
The combination of the drastic requirements of the Versailles Treaty, the warring political factions in Germany, and then the worldwide economic depression doomed any chance for a peaceful recovery to a democracy.
The knowledge of history is important for these debates and if most of the postings so far are any example, our schools aren't doing very well with that subject.