But when you do this, have the location you are going to filled with supply depots. Then you have locations x, y, z. You have triggers "player1 bring atleast 1 bunker to anywhere, center location x on bunker owned by player1" , "player1 bring atleast one bunker to location x, center location y on supply depot owned by player2 at z" , "player2 bring atleast one supply depot to y and player1 bring atleast one bunker to x, remove one supply depot at y for player2 and move bunker at x to y for player1" . It is a bit long, but it will work. Locations x and y are 2x3, and location z is over the entire area that you move bunkers to. And you can substitute any 2x3 building for supply depots, like armories and shield generators.