Gildor's got a gun

[Inziladun]

Originally Posted by Nessa Telrunya

Well, what about the last march of the ents? It may not have been the most secretive events, but they in effect nipped Isengard "in the bud" Saruman wasn't killed then, but that would have been a blow to Sauron.

It was an action against Saruman (and by proxy, Sauron) to be sure, but that event was not planned by the Wise, nor do I think that it could have been.
It was more of a lucky break for Rohan, precipitated by the 'chance' visit to Fangorn by a couple of wayward Hobbits.