Anko made a critical desicion in Chapter 64, not to hunt Orochimaru.
Because Orochimaru said that Konoha would fall if they did.
Jiriaya was in Konoha then, The 3rd and Him could of beaten Orochimaru.
And as for Orochimaru's plan to make Konoha fall.
Sunagakure would of fallen if they didn't go along with orochimaru, so the Sand Village is out of the way.
The sound ninja are childs work.
And Orochimaru's strongest 5 ninja(minus Kimimaru he was sick, add Kabuto he was there) were beaten by Chouji, Neji, Kiba, and Shikamaru. Kakashi would beat Kabuto and the other jounin would probably make quick work of the Sound 4.
I know they were thinking that Orochimaru has some big huge army behind him, and he did. But with the sound out of the way, the Sand backs off too because they no longer need to attack. I know back then it seemed smart, but considering what has followed, do you think she made the right choice?