How to cut off communications

[MasterBob]

How do you make a certain civilization not communicate with another? Does the Vendetta option Do that?

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MasterBob,
Master of all Bobs,
Webmaster---Come to my UBB forums at my Civilization site
Almighty Holy UBB forums

If you do not go the wise way of the fish, you shall slowly go the way of the buffalo.

[Cam]

Use the @negotiation event as explained in macro.txt in your Civ2 folder and play the game as a scenario.

If you want to prevent negotiations in mid-game, you'll have to go through the rigmarole of creating a second events file, getting the player to save, delete the old events, introduce the new events, then restart where they left off.

'Vendetta' I understand to be that the tribe believes it has been sneaked/snuck (?) attacked every turn.

The rules differ for Test of Time - again read the macro.txt there.