[quote=Willy Vereb]
EMP is practically useless against anything which was deigned to have a remotely decent but all-around protection against energy weapons.Then you have the inverse square law which makes it massively inefficient against anything that isn't right next to the pulse.By far EMP is one of the worst choices to take down a considerably advanced robotic civilization.
[/quote]

And robots are a much less effective way of waging war. A battalion of robots may not be as taxing on food, but the metal and circuitry required to create them far outways that gain, especially when they get blown apart just the same as a human. So, a considerably advanced robotic Civilization is it's only worse enemy in anything more than a one-sided war.