Treasury Secretary Scott Bessent announced new sanctions against Iran on Monday, describing the move as the greatest coordinated economic isolation campaign in history [1].

The measures aim to force the Iranian government to negotiate a deal that includes surrendering highly enriched uranium and opening the Strait of Hormuz [4].

During a press conference held Monday afternoon, Bessent said the sanctions are "the single greatest financial offensive ever marshalled against an adversary" [2]. The strategy targets entities that provide support to Mahan Air and the Islamic Revolutionary Guard Corps (IRGC) [3].

Bessent said the goal is to isolate Iran economically to prevent it from "helping sustain a terrorist enterprise" [5]. The administration is using these financial levers to pressure Tehran into specific security concessions regarding its nuclear program and maritime access [4].

Bessent said any potential agreement with Iran is contingent on the opening of the Strait of Hormuz and the turnover of highly enriched materials [4]. The current campaign seeks to block the flow of capital to the IRGC and other designated groups [3].

While some reports varied on the timing of the announcement, the press conference occurred on Monday, Aug. 24 [1, 3]. The administration intends to maintain this economic pressure until the stated conditions for a deal are met [4].

the single greatest financial offensive ever marshalled against an adversary

This escalation represents a shift toward maximum economic pressure intended to secure tangible security gains. By targeting the IRGC and Mahan Air, the U.S. is attempting to sever the financial arteries of Iran's military and logistical operations. The demand for the opening of the Strait of Hormuz is particularly significant, as it addresses a primary global energy chokepoint that Iran has frequently used as geopolitical leverage.