These US Navy Ohio class SSBN submarines have 24 Trident missiles with 8 MRV warheads per missile. These missiles have up to 7,000 miles range. It’s crazy to even think about attack and invade the US even for China or Russia. US Navy has 14 of these SSBN plus 4 converted SSGN with Tomahawk cruise missiles. These submarines are backbones of the US nuclear force which is the largest nuclear ballistic missile force in the world.