DUBAI ¨C Emerging outlines of a deal between Washington and Tehran to end their war contain a stinging paradox: sweeteners to coax Iran into compliance may strengthen an adversarial force that the U.S. and its Western allies consider a terrorist organization.

For years, Iran¡¯s Revolutionary Guard thrived in the shadow of sanctions, building a sprawling commercial empire stretching from oil and construction to shipping, telecommunications and ports.

Now, as Tehran and Washington prepare for talks on a deal to end the war that could unlock billions of dollars ?for Iran and reopen its economy to global investment, the elite force is poised to be one of the biggest beneficiaries.

Four senior Iranian sources described ?how the ?Islamic Revolutionary Guard Corps (IRGC) was uniquely placed to capture a big chunk of any financial rewards that would accrue from ?sanctions relief, renewed oil exports and foreign investment.

Their central role may also prove to be one of the many obstacles to a deal: with the Guard so firmly enmeshed in Iranian business, its terrorism designation could significantly complicate efforts to free the economy from sanctions.

Founded by Iran¡¯s late revolutionary ?leader, Ayatollah Ruhollah Khomeini, the Guard prospered under his successor, Ayatollah Ali Khamenei, gaining political power as its spearheaded efforts to project power across the Middle East and suppress dissent at ?home.

Since the war began on Feb. 28 with strikes that killed Khamenei, the Guard has only expanded its power internally, helping to install his son Mojtaba Khamenei as the new supreme leader. It has signaled support for the deal to end the war.

One of the ?senior sources described the Guard as the real winner of ?the war, saying that, having secured the survival of Iran¡¯s Islamic system, it was best placed to benefit from any lifting of sanctions ¡ª having already run most of Iran¡¯s sanctions-busting operations over recent decades.

A spokesperson for the Guard ?declined to comment.

The interim deal announced ?this week will allow waivers on sanctioned oil sales while any more comprehensive agreement struck in the ?coming period could lift all other sanctions and give Iran access to a $300 billion reconstruction fund.

The IRGC does not publish financial data, but ?any efforts to revive ?the economy will expand its considerable financial reach, a second senior source said, pointing to existing multibillion-dollar trade networks, oil activities, shipping operations and construction businesses.

The IRGC¡¯s engineering arm, Khatam al-Anbia, oversees hundreds of affiliated companies operating across major infrastructure and energy projects, and with involvement in telecommunications, car making, tourism and logistics, according to official statements and public records.

The White House did not immediately respond to a request for comment.

With Iranian investment law requiring foreign firms...