Bangladesh, Aug. 1 -- In a dramatic escalation of its pressure campaign against Tehran, the United States has unveiled a sweeping package of new sanctions targeting an extensive Iranian oil shipping network, in what officials have described as the most “massive” set of Iran-related sanctions since 2018. The measures, announced on July 30, target more than 100 individuals, entities, and vessels allegedly involved in a complex scheme to export sanctioned Iranian oil and funnel billions of dollars in revenue back to the regime.

The move marks a renewed push by the administration of President Donald Trump to reinvigorate his “maximum pressure” strategy aimed at forcing Iran to abandon its uranium enrichment program an...