If the U.S. Navy was going to carry out a full on attack against a country as strong as Iran, In terms of firing Tomahawk Cruise Missiles this is what they would likely do
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Deploy as many as 4 Fleets with up to15 Ticonderoga Missile Cruisers between them in the initial offensive deployment
1.Indian Ocean - As many as 5 Ticonderoga Missile Cruiser among the fleet
2.Red Sea - 2 Ticonderoga Missile Cruiser
3.Meditation - 3-6 Ticonderoga Missile Cruiser
4.Black Sea - 3-6 Ticonderoga Missile Cruiser
Between them and other vessels in their fleet they will likely fire upwards of 2000 cruise missiles in the initial attack after that the U.S. Air Force will likely be flying B-2's back and forth between Poland and Diageo Garcia to deliver heavier ordinances while small teams of US special forces carryout attacks against known/fixed radar, SAM & com's using small drones & UGV and these are just in the initial attack
This is why it's vital for Iran to continue the development and deployment of larger subs (Preferably one with twice the size/mass of the Fateh with double the fire power) produced at much higher rates. And why Iran's navy needs to equip it's self with vessels that are equipped with a good number of LaCM and or capable of deploying swarms of suicide drones.
This is why as soon as the IRGC tested the Simorgh UAV(RQ-170), Iran's Air Force should have gone to the IRGC and begged for a joint project to develop and mass produce a large number of larger bomber version modified to be powered by 2 OwJ engines to start with and plans to build larger version with a higher angled wing and more powerful engines....
The ONLY way to prevent a war is to produce and deploy enough highly capable weapons that no country would ever dare to even think about attacking you.