Swastika would make a weak fortification, this is what the white man would use
You don't want flat walls facing the enemy. Nor would you want your defneders to run around from one arm of the swastika to the other because the outer walls aren't connected in a swastika shaped castle wall.
This is a good video on star castle formations and how they fair in sieges. https://youtu.be/iQG7iVaFSGs
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