At this point, it’s hard to be very precise about a hypothetical full-blown conflict. We know it would feature a series of moves and countermoves, we know it’d be very messy and confusing, and we know it’d be extremely deadly.
But unlike with the path to war, it’s less useful to offer a play-by-play of what could happen. So with that in mind, it’s better to look at what the US and Iranian war plans would likely be — to better understand the devastation each could exact.
How the US might try to win the war
The US strategy would almost certainly involve using overwhelming air and naval power to beat Iran into submission early on. “You don’t poke the beehive, you take the whole thing down,” Goldenberg said.
The US military would bomb Iranian ships, parked warplanes, missile sites, nuclear facilities, and training grounds, as well as launch cyberattacks on much of the country’s military infrastructure. The goal would be to degrade Iran’s conventional forces within the first few days and weeks, making it even harder for Tehran to resist American strength.
That plan definitely makes sense as an opening salvo, experts say, but it will come nowhere close to winning the war.
“It’s very unlikely that the Iranians would capitulate,” Michael Hanna, a Middle East expert at the Century Foundation in New York, told me. “It’s almost impossible to imagine that a massive air campaign will produce the desired result. It’s only going to produce escalation, not surrender.”
It won’t help that a sustained barrage of airstrikes will likely lead to thousands of Iranians dead, among them innocent civilians. That, among other things, could galvanize Iranian society against the US and put it firmly behind the regime, even though it has in many ways treated the population horribly over decades in power.
There’s another risk: A 2002 war gameshowed that Iran could sink an American ship and kill US sailors, even though the US Navy is far more powerful. If the Islamic Republic’s forces succeeded in doing that, it could provide a searing image that could serve as a propaganda coup for the Iranians. Washington won’t garner the same amount of enthusiasm for destroying Iranian warships — that’s what’s supposed to happen.
Trump has already signaled he doesn’t want to send ground troops into Iran or even spend a long time fighting the country. That tracks with his own inclinations to keep the US out of foreign wars, particularly in the Middle East. But with hawkish aides at his side, like Secretary of State Mike Pompeo, there’s a chance they could convince him not to look weak and to go all-in and grasp victory.
But the options facing the president at that point will be extremely problematic, experts say.
The riskiest one — by far — would be to invade Iran. The logistics alone boggle the mind, and any attempt to try it would be seen from miles away. “There’s no surprise invasion of Iran,” Brewer, who is now at the Center for Strategic and International Studies think tank in Washington, told me.
Iran has nearly three times the amount of people Iraq did in 2003, when the war began, and is about three and a half times as big. In fact, it’s the world’s 17th-largest country, with territory greater than France, Germany, the Netherlands, Belgium, Spain, and Portugal combined.
The geography is also treacherous. It has small mountain ranges along some of its borders. Entering from the Afghanistan side in the east would mean traversing two deserts. Trying to get in from the west could also prove difficult even with Turkey — a NATO ally — as a bordering nation. After all, Ankara wouldn’t let the US use Turkey to invade Iraq, and its relations with Washington have only soured since.
The US could try to enter Iran the way Saddam Hussein did during the Iran-Iraq war, near a water pass bordering Iran’s southwest. But it’s swampy — the Tigris and Euphrates rivers meet there — and relatively easy to protect. Plus, an invading force would run up against the Zagros Mountains after passing through, just like Saddam’s forces did.
It’s for these reasons that the private intelligence firm Stratfor called Iran a “fortress” back in 2011. If Trump chose to launch an incursion, he’d likely need around 1.6 million troops to take control of the capital and country, a force so big it would overwhelm America’s ability to host them in regional bases. By contrast, America never had more than 180,000 service members in Iraq.
And there’s the human cost. A US-Iran war would likely lead to thousands or hundreds of thousands of dead. Trying to forcibly remove the country’s leadership, experts say, might drive that total into the millions.
That helps explain why nations in the region hope they won’t see a fight. Goldenberg, who traveled recently to meet with officials in the Gulf, said that none of them wanted a US-Iran war. European nations will also worry greatly about millions of refugees streaming into the continent, which would put immense pressure on governments already dealing with the fallout of the Syrian refugee crisis. Israel also would worry about Iranian proxies targeting it (more on that below).
Meanwhile, countries like Russia and China — both friendly to Iran — would try to curtail the fighting and exploit it at the same time, the Century Foundation’s Hanna told me. China depends heavily on its goods traveling through the Strait of Hormuz, so it would probably call for calm and for Tehran not to close down the waterway. Russia would likely demand restraint as well, but use the opportunity to solidify its ties with the Islamic Republic.
And since both countries have veto power on the UN Security Council, they could ruin any political legitimacy for the war that the US may aim to gain through that body.
The hope for the Trump administration would therefore be that the conflict ends soon after the opening salvos begin. If it doesn’t, and Iran resists, all that’d really be left are a slew of bad options to make a horrid situation much, much worse.
