The Emu War.
The noble emus valiantly defended themselves from the Aussie scourge, OP wanted examples of the bad guys winning not examples of the opposite!
They did not defend themselves valiantly they cowardly ran away like a bunch of emus
"Okay, it looks like the humans are coming for us. But check this out. I've come up with an amazing plan. See if you can follow me here, okay? When they approach, we run away."
“Sir… you’re a genius”