How powerful is Iran’s military? Can it take on the US if it attacks?

Nationwide anti-Khamenei protests in Iran have escalated tensions with the US, with President Trump considering air strikes to stop the crackdown on protesters. Iranian leaders have threatened harsh retaliation against the US and its allies if attacked, highlighting Iran's significant military and missile capabilities. Despite Iran's large military and missile arsenal, experts note it lags behind the US and its allies in sophistication and does not currently possess nuclear weapons.