By Jana Choukeir and Susan HeaveyDUBAI/WASHINGTON, Aug 21 (Reuters) - U.S. Treasury chief Scott Bessent said the United States will impose "the toughest sanctions in history" on Iran, a move he suggested would lessen the need for new major military operations.Bessent's comments on Thursday followed President Donald Trump's threat a day earlier of "Economic Warfare" and warning of economic consequences against any country that provided "any type of lifeline to Iran." Bessent promised details next week.

US treasury secretary vows Washington will 'collapse' Islamic Republic regime, promises toughest sanctions yet; US targets Hezbollah with new sanctions, emphasizing ties to Tehran

US announces toughest sanctions on countries trading with Iran. Iran reconstruction funding in a US-Iran deal by 2026 at 18.5% YES.

Treasury chief to hold conference next week outlining plan on sanctions campaign

US Treasury Secretary Scott Bessent says Washington will impose its toughest sanctions on Iran, while China urges diplomacy and rejects sanctions pressure.