Iran regards the sole threat to its territory as coming from the Persian Gulf; i.e. from a US-led naval invasion of Iran and is actively training to counter this perceived threat. However, on the face of it, this seems utterly implausible in the extreme. Why would the United States want to get entangled in yet another land war in the Middle East, this time in a far larger and far more populous country with a difficult and mountainous topography? The obvious answer is that the US government does not want that under almost any circumstances since it is a nightmare scenario and the mission is so difficult that it would take at least a year to conquer Iran.
Why then is this “nightmare scenario” so realistic to the Iranian regime? Because they and no one else are able to provoke it by means of using biological weapons against major American cities. The first response of the US would be to implement a no-fly zone over the entire Iran, bomb police and IRGC facilities and provide air support to insurgents. This is extremely likely to bring out most of the adult population into the streets for major revolution and will in all likelihood result in the downfall of the regime although the regime does not believe so. However, if this contrary to all expectations does not materialize and the regime does not fall then the US will have no choice but to liberate Iran as beginning with a naval invasion.
You may wonder why Iran would attack major American cities with biological weapons if this is certain to lead to the downfall of the Iranian regime? The answer is that Iran’s clerical leaders wish to provoke the Hidden Imam to reappear while Iran is still a regional great power and it will only be one as long as Iranian oil is exported to other nations.
The reality is that the ruling mullahs are living with the sword against the neck and the name of that sword is Tesla and the sword is held by Elon Musk. The mullahs know that oil will be phased at some point in the foreseeable future and then Iran will become destitute and powerless. They understand that control over Arabian oil is key to global hegemony for as long as oil is exported. Therefore, Iran cannot indefinitely defer its planned apocalyptic war crucially meant to bring about the reappearance of the Hidden Imam. Yet, Iranian theo-strategists understand that this may even so fail and the Hidden Imam might not reappear after all despite the engineered global apocalypse and so Iran must hence prepare to defend itself against a US-led naval invasion. Of course, the mullahs do not regard this as the end of their regime as they plan to fight a guerrilla war taliban-style until they have retaken power in all of Iran. However, it must never be ignored that engineering the reappearance of the Hidden Imam is the very raison d’être of the Khomeinist regime. Their Plan A is developing a nuclear arsenal and to thus gain impunity and immunity from any attack and invasion and then launch their global apocalyptic terror war with weapons of mass destruction. They have a Plan B global WMD apocalypse however for the scenario of their nuclear program becoming neutralized by Israel and the USA. This is why they are training to prepare to counter a US-led invasion.