If you tell a unit to move to a hex, and that hex is both covered by fog of war and also happens to have an alien on it, your unit will automatically attack the unit.
This is pretty irksome, especially when the unit you're moving is an explorer. If I tell an explorer to move to a hex, and I'm not aware that there is an alien on that hex, my intention as the player is simply to move my explorer, not engage in a risky combat that will threaten the life of my explorer if there happens to be an alien there.
In Alpha Centauri there was an option that let you cancel a unit's remaining movement if the movement order resulted in putting your unit next to an enemy unit. Is there a similar setting somewhere in Beyond Earth that cancels movement if it would result in such an unexpected attack?