The towers are basically the standard Human Guard Towers, but with Invulnerability and slightly higher attack. What I'd like is for the game to say "Must attack an enemy unit." (or something like that) when I try to attack my own unit in-game. This is because, like in the board game Risk, you have to have at least one unit defend your base. With my triggers as they are, when you kill your own unit with one of your units it instantly moves the killing unit in to defend. But with a tower, since I've ensured that it can't move, somebody could theoretically kill their own defender and not have to worry about leaving one unit back the rest of the game, getting around the restriction and causing a problem trigger-wise. <PHEW.>
Basically, I'm trying to get around writing a trigger to fix this, because you should be able to set Combat - Attack1 - Allowed: to "Enemy, Ground" and have it attack only enemy ground units. Unfortunately, it assumes I want it to be able attack enemies AND all ground units when I do this, and since my own players are ground units it sees them as a valid target. And when I just choose "Enemy", since the enemy's units are ground units, it says "Cannot target units." when I try to attack one. Try it out, you will see my frustration!
Anyway, if you know of anyone who knows the workings of the targeting system, let me know PLEASE. I have never understood it (EXAMPLE: What is the difference between unchecking "Ancient" vs. checking "Non-Ancient"? It's confusing.) | 
