my great great great great great grandfather who is alive in that time has defeated you with his ninja-awesomeness and put the mountain in his will and it is passed out throughout the generations to me
I'm not sure ninjas were in existence during 10,000 BC (That's is how far back I went.) But whatever. I just come up to your house when you're at work and I ransack your house until I find that will. The mountain is mine again.
i have a meeting with president obama about the mischief of this mountain, he agrees that handing the ownership of the mountain to me is the best solution
And just like other Dictators in history, your army turns on you, or... you are defeated by the Seventh coalition forces and the Prussian and Anglo-allied armies at Waterloo......
I come in as a military minister. The mountain is mine.
While you busying chasing sam down the mountain, I claim the mountain as mine.
After that I plant every kind of booby traps that known to mankind on every inches of the mountain, so that nobody would be able to claim it back.
Sets off one trap from somewhat far away and watches as it causes a chain reaction with every other trap while you sitting helplessly in the middle. Then walks off laughing and claims the mountain next door that isnt burned to the ground. You can keep your mountain.