By Samia NakhoulISTANBUL, Sept 6 (Reuters) - Six months after a conflict that rattled markets and pushed the Gulf to the brink of a wider war, the tide may be turning against Iran as Washington unleashes an unprecedented economic offensive to achieve what military force could not.

Tehran announces 'Economic War Headquarters,' as US sanctions bite; Iran's oil minister says Kharg Island hit 550 times in recent months, as CENTCOM strikes ship off its coast

In response to severe US sanctions, Iran aims to implement economic reforms alongside bolstering its military capabilities. After a short lull, tit-for-tat military actions have…