Rules for castellos/fortezzas

At the german armati-Forum was it told to me, at the Tactica rules are rules for fighting with fortezzas, castellos, or so. Is this true? Can I take this rules in a simple way for a ready made Armati-II szenario?

Yes Martin,
what you read is true

But I do not know if you can use it in a scenario ARMATI2

Some time ago we played the siege of Jerusalem with the TACTICA2 rules.
If you can find more information by clicking on:
https://spadoniecannoni.forumattivo.it/t315-l-assedio-di-gerusalemme-ad-1191-con-tactica#1365

No,
it is not the matter to have a fortress for a siege into a scenario. It concerns whether it is possible to use one at the periphery of a scenario. There were sufficient battles, in which the outermost edge of the flank of an army was covered by a fortress or a castle, or where a fortressed city or a castle was the rear support of the defending army. It concerns much more optical impression. But if one or more units occupies such a fortress for a scenario, for example bowshooters, then should they be able to intervene also in the fight.