There are other analogous groups that provide support for an arm in one of the other two spheres of deployment - for instance the RAF has the RAF regiment for ground deployment, the army has the paratroop corp, and the navy has the Fleet Air Arm and the Royal Marines.
Parachute
regiment. And the good old maroon machine does the same work as just about any other infantry regiment nowadays, just better.
Marines exist because their methods and doctrine contain options and abilities that the Army doesnt have.
T'was the case until now; in the UK we have 3 Commando Brigade with a whole battalion of infantry (1 RIFLES) attached from the army. Originally, that was however true.
Marines were meant to be shock troops to assault beachheads, survive and achieve the goal. As a whole, they are generally viewed as a higher trained force in comparison with your regular army infantry unit, on par (more or less) with the Army Rangers (another specialized unit).
The tradition of having marines is most prevalent in nations with large maritime histories. Again, it takes a different skill set to defend a ship effectively, and/or be able to assault a defended beach from the sea.
Now that is a very, very small synopsis on something you could probably write a whole dissertation to. So what you get out of that may vary.
This is most of the story pretty decently summed up. Essentially, infantry in the bad old days fought in the massive blocks that you see in video games, on land, very dependant on good drill and good ground with open space. On a ship or making an amphibious attack you don't have those luxuries; troops were needed who could act as much more independant, elite soldiers. They were trained as line infantry as well, and until very recently the Royal Marines had a place in the army order of precedence.
I understand they that are an elite, MB, and that they do different things, but so does the engineer corps, the paras, special forces etc, yet none of them are a completely seperate branch.
That's because the USA believes that if you tie the marines to the navy, they won't be able to carry out their role as an infantry unit as effectively because their senior officers will be sea officers, and if you tie them to the army they won't be able to manage the close co-operation with the navy that they need. The UK approach is to make them nominally part of the navy, but to make them essentally a seperate service with their own commander, own military academy and ships of the fleet set aside for them. In some countries, special forces are a seperate service (including the UK's SRR) for the same reason, but the logic has always been that there are engineers in each service so that they can work well with anyone, because any engineer unit will be trained as the people with whom they are working. In Mexico, the parachute units are part of the air force, so the model isn't universal.
Marines are trained to assault the position standing up.
Ball locks. That's a good way to get yourself shot to peices.
They are easy to disarm. Its not a wine glass. But anytime you are dealing with something that goes 'boom' like that being careful is common sense.
That's true, relatively speaking (I was trained in basic demolitions) but if you can get behind the hard metal bit your enemy is doing something hideously wrong. The only time I ever disarmed one in anger was when we left a position that was providing a scary prescence (or was that security?) to a back-street in Aden, and somebody had got hold of one and put it in our base.
Nah, call the SAS. Much as I hate to say it.
Agreed. Problem is nowadays they've got no men, so in the absence of paras wanting to join the SAS they look for help from - the paras!
Or the SBS, which is part of, you've guessed it, the Royal Marines.
Yes; but it's pretty much seperate (entrants from all services are welcome, and it operates far more closely with the SAS' boat troops than Royal Marines)
Simply because they arent being used in an amphib assault role doesnt mean they are not capable of doing that mission.
Tell that to General Richards! The army nowadays seems hell-bent on getting rid of the parachute regiment because they never seem to parachute.