Can't help but thinking of a duck shoot if US forces land on Kharg Island, and it's a long sail up the Persian Gulf to get there...
They have to transit the Straits of Hormuz, to attack Kharg Island from the Sea, and, who controls Hormuz Strait?
I accept I am not. a military strategist, but, it appears to me only an airborne attack is a possibility.
Once captured, it has to be supplied, unless the occupiers are going to eat, drink and shoot oil.
Even if they take possession of Kharg Island, which may deny Iran oil revenue, how are they (the occupiers) going to to get the oil OUT, it still has to go through the Straits of Hormuz.
Any possibility of a "surprise" attack is surely gone, even we know how many and what type of US troops are in, or approaching the area. The Iranians probably know their names and addresses.
Am I missing something?