All you have to do is to do whatever you can just to make the hill yours.
Example:
Person 1: I claim the hill.
Person 2: I take out an RPG and fire it at you. My Hill!
Person 3: I take out a tank and run over you. My Hill!
Example:
Person 1: I claim the hill.
Person 2: I take out an RPG and fire it at you. My Hill!
Person 3: I take out a tank and run over you. My Hill!