BonsaiK said:
For us who are not down with the military lingo, what's the difference between Marine Corps and Navy?
For any other country, the Marines are the Navy's soldiers. In Britain, they're part of the Navy like the Parachute Regiment is part of the Army and there's quite a bit of rivalry between the two. Each has its own special forces, the Special Boat Service and Special Air Service.
For the USA, the Marines are nominally part of the Navy but in practice they're internally tri-service, with their own air, land and sea units. The USMC is about the same size as ... either the British Army or the British armed forces ... and generally considered equivalent.
To the topic:
The big thing is control of the ground. It's people at the oil field, refinery and terminal, along the pipeline, at the road junctions, at the harbour, at the airport and on the streets. Looting happens where there's noone securing the streets. Sabotage happens where noone's watching. Ethnic cleansing, aka mass murder, genocide, civil war, gang violence or whatever, happens where there are no security forces patrolling.
An F-16 or Apache or a Harrier or B-52 is no use against a gang dragging people from their cars for being the wrong colour, religion, sect, cult, gender or age and shooting them. You can't stop a rape with a 500kg bomb. Well, you can but you won't be very popular afterwards. As has been shown again and again and again, you can't see what's happening on the ground and make the call while hurtling through the sky at 700mph and 10,000ft.
The talk of second-, third- and fourth-generation warfare concentrates on shifting emphasis among the support arms but the basic idea remains the same: control the ground. Tanks (cavalry's modern form) are support. Artillery (formerly a unit of archers, then siege engines) is support. Communications are support. The engineers are support. The catering corps is support. Medical personnel are support. Transport is support. Ground-controlled airstrike capability is Close Air Support. Intelligence is support.
Fox NePropaganda is support. These guys [http://www.independent.co.uk/news/world/asia/return-of-the-sniper-how-ancient-skills-are-experiencing-a-modern-renaissance-in-afghanistan-1727300.html] are support even if you call them force multipliers. The big deal is whether you have infantry (always infantry) controlling the ground. They've gone from spears via muskets to assault rifles and GPMGs (the yanks call it a SAW) and shiny armour via bright cloth to camouflage but they're in the same role now as then.