In Frontier, to siege a town, you have to choose the fight option before you enter the town. When it asks you if you want to enter, over on the right there should be another option that says “Fight”. But be careful, cities are pretty powerful.
sorry i didn’t get back to your Ib2 question, i guess i didn’t took untill now, and in my cpu it’s a bit old so i can see a faint outline of the invivble blacks i made, i uninvibled them for you just go to this link hope it helps Unfo
http://incredibots2.com/?robotID=unforg1ven4a5df24bc5f131.99526261
 "Umezega"){kind=small}
 "darkknight999999"){kind=small}
 "TheUnforg1ven"){kind=small}
 "Monster246124"){kind=small}
 "Mokevo"){kind=logo}
 "yakov2020"){kind=small}
 "DaSchupp"){kind=small}