Marines do it by "locating, closing with, and destroying" without detection...
In other words, we "Git'r Done."
There's not one example cited of Marines involved in marijuana eradication, and that's a good thing - it would have to go on forever. There's no end game and there are not enough Marines to cover all the forests. Secondly, it ain't gettin' done. Illegal cultivation in the areas we like to hike in is spreading out of control despite all these National Guard troops and billions of dollars spent over decades. It's been a failure and there's no indication it will ever work.
Let's wait and see how legalized growing works in Colorado and Washington before bringing Marines into our forests. Will it reduce the incentive to grow illegally in our forests? Perhaps. We can always go back to what ain't working now.
Operation Crackpot....yes, looking for meth labs (crack) and marijuana fields (pot)...
We don't "broadcast" our accomplishments....no embedded reporters...celer, silens, but no mortalis when it comes to covert operations. We let the law handle the handcuffs, we just say to the perps, "Sit your punk @$$ down."
So no examples, no press releases...get in, get out, git'r done, and get home.