The U.S. Marine Corps is a branch of the U.S. Navy and serves as the country's quick reaction force, capable of deploying rapidly to crisis zones anywhere in the world. The Marines have a unique ability to operate both at sea and on land, and have a wide range of capabilities, including ground combat, air support, logistics, and reconnaissance.

The U.S. Navy is responsible for maintaining and protecting the country's seagoing forces and ensuring freedom of navigation on the world's oceans. The Navy has a significant number of assets, including aircraft carriers, submarines, surface combatants, and support ships, as well as a large number of aircraft and trained personnel.

In some cases, the Marines and Navy could operate independently in limited conflict scenarios, such as a small-scale naval engagement or a limited amphibious assault. However, in larger-scale conflicts, they would likely require support from other branches of the military, such as the Army or Air Force, to provide additional ground forces, air power, and logistical support.

In conclusion, while the U.S. Marine Corps and Navy have the capability to carry out Limited Independent Military operations, their ability to do so effectively and sustainably would depend on several factors and would likely require support from other branches of the military in more complex scenarios.