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As title really.

So the region of Herat declared independence from Persia, leading to the Anglo-Persian War.

Whilst a bit of an odd option, what if the Persians agreed to become a vassal state of the British (or some sort of autonomous part) - in exchange for authority over the British Central Asian concerns.

The rationale being that working with and for the British at this point could expand and restore Iran to its full height, control over all of Central Asia, the Caucuses, and even parts of Arabia.

Considering the Great Game is in play at this time, do you think the British would accept this offer? What would the impact of that acceptance be?
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