Since 1651, the Persians, and Russians fought wars against each other for control in the Caucasus. But ever since 1722, the Persians lost more and more land in the Caucasus, and influence there.
The Treaty of Turkmenchay was a national failure for the Persians, losing a ton of Caucasian land, and in debt to Russia for money.
But what if Persia during the Crimean war, during British, and French entry, decided to join the Ottomans against the Russians to redo their "Persian Alsace-Lorraine" And reverse the treaty of Turkmenchay?
Could they succeed?