Is the war over?

Trump, Boris Johnson and Angela Merkel are taking a walk along the North Sea shore. Boris boasts: "The Royal Navy now has submarines that can stay underwater for a year without needing to resurface for fuel! Pretty impressive, don’t you think?"
Trump obviously can't leave it at that, so he tells Boris: "America has submarines, and other stuff too, I'm telling you, lots of stuff, and it's great stuff, and our submarines can stay underwater for years, great years, and also, they don't need to come back up to the surface for so long, so very long, for more than two years because I made them great again!"
Merkel is just about to change the topic to export politics when suddenly a submarine resurfaces next to the three, the hatch opens and an elderly man emerges with a swastika on his uniform, salutes and shouts : „Heil Hitler!." „Is the war over?“