If I have no units in a tile, what happens? Ex.: If i move the three troops in Iberia, what happens to the tile I currently own?
Here's what the rules say on moving every unit out of a tile:
"If you move units into an unclaimed territory, you automatically claim it. By the same token, you must keep at least one unit in a territory owned by you to maintain ownership. If you have no units stationed in the territory, it is considered abandoned."