>>508028584 (OP)USA couldn't defeat the Taliban or Houthis.
Iran is 90% mountains, which provide excellent cover to shoot down any planes and drones, as we saw in Afghanistan.
The only thing USA can do is do a ground invasion from the south, but it lacks the troops to effectively fight 90 million Iranians who are highly motivated to defend their homeland, as they saw what US/Israel backed "regime change" looked like in Iraq, Libya, Syria etc.
US troops will be encircled and slaughtered the second the step on Iranian soil.
The only way for USA/Israel to "win" this is to nuke Iran, which won't happen as Russia will likely draw a red line and promise retaliatory nukes should it come to this.
The US empire will find its end in Iran.