“The French aren’t going to hold the Germans down for long.”
Remember, it took more than the Prussians . . . there were also the red squares of Wellington’s British, the Dutch, Russians and others.
Napoleon was not going to prevail in 1815, but the battle at a place called Waterloo was a near thing. Blucher was certainly welcomed by Wellington late in the afternoon.
Napoleon lost enough in his ill-considered Russian campaign that not even Wellington could louse it up.