I move my units near Berlin to assault the city. When comes the turn to attack I move it to Berlin, and WTH nothing happens my unit just go on the city tile and doesn't attack. I checked before moving my warriors options, and there is no attack button. I checked once I'm on the city tile to see if there's an attack option still nothing. How do you attack???
!) should allow for totally open borders and a big bonus to trade. However, such pacts should require formal cancellation BEFORE you can go to war. Also, though, it should be possible for a player to open their borders to a civ without the need for said pact, it just should be a very uncommon occurance.