How do I make a Zone capturing mechanic

Help
1

So I am making a game where 2 teams have to capture all 3 three of the other team’s zone to win. But I don’t know how to stop players from capturing their own zone. Does anyone know how to prevent that??

2

Removed research since that’s Devices.

3

what is your way of making the capturing system?

4

The player stands in the enemy team’s zone which decriments a counter and when it reaches zero they capture it. each team has 3 zones and when they all get captured whichever team captured them wins

5

Sooooo how do I make the mechanic?