It would have been nice to add something like a message telling you to surface and tune in your radio. Then when you surface you hear actual audio recordings of radio reports from the end of the war, and you can hear your men cheering too.
Then it could take you to a cut-screen with actual historic photos and videos of submarines at the end of the war, with background music or more radio reports.
Word boxes could flash up on the screen telling the history of submarines immediately following the war, maybe tell what happened to key players like Swede Momsen.
Something like this would tie up the end of the game nicely and wouldn't really take up much resources or programming time.
I haven't reached the end yet, though... so I'll have to wait and see the movie Ducimus mentioned.
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