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As title really.

I'm curious as to what the repercussions of (and the mechanics of) a Roman Independence movement rather than Greek. Perhaps even including the Patriarch.

I won't lie, during a rather pain-induced/painkiller induced daydream yesterday I had this awesome image of a man appearing dressed as the 'Marble Emperor' in Istanbul calling for independence/restoration, and become a sort of Freedom Fighter figure, exploiting the cisterns of Istanbul.

So yeah, how could/would you engineer a Roman Independence movement that succeeds at roughly the same time ~1821.

Bonus Points if:
1) It doesn't rely on outside help outside of supplying arms.
2) It takes control of Istanbul successfully in the early stages of the 'Struggle' and keeps it.
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