海角大神

Iran鈥檚 top commander has been authorized to coordinate military operations with US, Iraqi, and Kurdish forces battling Islamic State (IS) militants in northern Iraq, according to a report today by BBC Persian, citing sources in Tehran.

Iran鈥檚 Supreme Leader Ayatollah Ali Khamenei is said to have approved military cooperation with the US,聽a longstanding adversary,聽in the fight against what Tehran and Washington view as a common and growing threat.

A source close to Mr. Khamenei聽quickly聽denied that report to The New York Times'聽Tehran correspondent, however, and government officials later echoed the denial.

Even without an official stamp of approval, both the US and Iran聽have found themselves聽on the same side of聽the Iraqi battlefield since Baghdad's forces collapsed in northern Iraq and Islamic State militants surged in recent months. 聽

The聽US launched airstrikes against IS positions聽that broke聽a two-month siege on the northern town of Amerli聽last weekend.聽Concurrently, Iranian military advisors were on the ground guiding an eclectic mix of Kurdish聽peshmerga聽forces, Shiite militias, and Iraqi Army troops.

Images posted online show Iran鈥檚 Quds Force commander Qassem Soleimani, wearing a cap and a checkered scarf but no military insignia, in a desert area purported to be near the Amerli frontline in聽Iraq. The hardline site Raja News today published photographs of Maj. Gen. Soleimani praying with others at the front.

Yet any US-Iran 鈥渃oordination鈥澛爄n the latest iteration of war in Iraq is likely to be tactical only,聽given聽decades of mutual hostility聽between the two nations.聽And聽past聽cooperation efforts 鈥� especially in Afghanistan, where聽Iranian聽officials and the Revolutionary Guard provided critical targeting and other information to US forces聽after 9/11聽against the Taliban聽鈥� did not yield聽any substantial thaw. Iran also helped the US to bolt together a post-Taliban government in Afghanistan. Nonetheless, President George W. Bush declared in 2002 that Iran was part of an "axis of evil," a slap in the face for Tehran.聽

Nuclear deadline

The Iraq fight comes as both sides are locked in talks to limit Iran鈥檚 nuclear program; top diplomats from聽both sides聽are now meeting in Geneva in a bid to bridge gaps to meet a November deadline for a final deal.聽Added to the long list of possible spoilers: the聽Washington Post鈥檚聽Tehran correspondent Jason Rezaian, a dual US-Iranian citizen, and his Iranian journalist wife Yeganeh Salehi, have been聽held in detention in Iran for more than 45 days without charge.

And while both sides may be finding common cause in crushing IS, both have waged a covert war that has seen the assassination of Iranian nuclear scientists, the Stuxnet computer virus, and unexplained explosions and sabotage. Washington calls Iran the leading 鈥渟tate sponsor鈥� of terrorism, and in recent years a sting operation found an Iranian used-car salesman in Texas guilty of plotting to assassinate the Saudi Arabia ambassador in a Washington, DC restaurant.

Iranian officials in Tehran聽this week described attempts to recruit Iranian scientists abroad, and showed imported equipment for nuclear work that had been tampered with and sabotaged. 鈥淲e aim to raise awareness about the enemy, who is more hostile to us every day,鈥� Asghar Zarean, the head of security for Iran鈥檚 nuclear program, told the Associated Press.

Mr. Khamenei聽has repeatedly warned聽that the US can鈥檛 be trusted. In the past, he has limited or ruled out direct contacts with the US, depending on internal politics in聽Iran, for example, and the state of nuclear talks.

Yet analysts note that Iran鈥檚 foreign policy has long been rational and pragmatic,聽particularly when it comes to its nuclear program.聽The two most recent US National Intelligence Estimates on Iran, in 2007 and 2011, both noted that Iran adhered to a 鈥渃ost-benefit analysis"聽of nuclear strategy.聽

Proxy battlefield

Until now, Iranian and US officials have downplayed the possibility of directly working with each other, despite sharing the same battlefield. In mid-June, Sec. of State John Kerry said he聽鈥渨ouldn鈥檛聽rule out anything that would be constructive,鈥澛燽ut聽that first it had to be seen聽鈥渨hat Iran might or might not do before we start making any pronouncements."聽

Both sides are aware of the deep irony of de facto cooperation, in a war zone in which they previously fought each other, through proxies and sometimes directly,聽after the US-led invasion in 2003.

Freeing Amerli was a rare success against IS,聽and Iran has received credit for its backup role.

鈥淭he Iranians had a role in this. They supplied weapons and helped with the military planning,鈥� a Kurdish peshmerga commander told Reuters this week, in a district near Amerli called Suleiman Beg. The Iranians had trained the Shiite militias, he said, and helped Kurdish units target their artillery fire.聽