All with 2dMarDiv.
Back in the Day 1/10 was always assigned to 2d Mar Regt, 2/10 to 6th Mar and 3/10 to 8th Mar. They also had the same Brigade Service Support Groups And AirWing elements
4/10 was the Div GS Battalion (M-109s)
5/10 was the Div GS Reinforcing Bn (M-110)
Each Regt would have a set mission for 18 Month. example 2d Mar were the Norway/NATO, 6th Mar would be the Air Alert, and 8th Mar would do Med Floats (LF6F)
18months later 8th would take the NATO mission ect..
It worked out great. If 8th Marines went to the field all the liasons from3/10 went with them. If 1/8 went to the field Alpha Battery 1/10 sent all their people too. And they always had the same liasons from their BSSG and Air wing Squadrons. FOs and ALOs worked for the infantry S-3
So you are always training with the people/units you are going to be fighting with.
The MEU/MEB Command element 22d/24/26 comes from MarForLant. They get their MEU/MEB elements from 2d MarDiv, 2d FSSG and 2d Mar Air WIng
First 10 years in the Corps I was single. I volunteered, for as many deployments as they would let me go on. Think, as a young single 18-25 yr old would you rather hang out in Jacksonville NC (Fayetteville on the coast) or Palma /Barcelona Spain, Naples ect..?
My only non fleet time was with a Special Weapons Platoon for a little over a year before the President said no more Tac Nukes and 3 years as a Instructor.
After Ft Sill, getting married and being a SNCO, I had a reputation where BLT Commanders and once the MEU Commander requested me by name. Sometimes its bad to be the Go-To Guy.
4 years on ship and 3 1/2 stationed in the Far East out of 20 I got to see a lot of places. Some Great, some good and some really bad. Wouldn't trade it for anything
(wow that ran on, but I hope it answers the question)