World War I was no picnic for the Germans. About two million German soldiers were killed and countless others were crippled. The Austro-Hungarian Empire on the side of the Germans lost another million and a half.
The loss of life on the side of the Allies was similar, with about two million dead amongst France, UK, Italy and Romania, in that order. The American dead were a fraction of that, a little over 100,000.
The Allied country suffering the greatest number of dead was Russia, where life has always been cheap. Two million Russians were killed, matching the combined total of the other Allies. This proved a presage; the Russian dead in the next world war totaled over 20 million.
To the victorious Allies of WWI went the spoils. In the Treaty of Versailles, they confiscated about 10% of German territory and imposed punitive reparations of about $270 billion in today’s dollars. They prohibited the rebuilding of the German military (we know how well that worked over the next two decades) and stripped Germany of its overseas colonies.
Most humiliatingly, the Allies required Germany to acknowledge that the war had been all its fault. If WWI had been a football game, the Allies would have been flagged for end zone taunting.
The terms of the Treaty of Versailles were undoubtedly satisfying to the Allies, and perhaps gave them a measure of comfort that the Huns would not be at their doorstep again for a long, long time.