one thing i can't understand is how Tsunde knew to call for back up from the sand...

she couldn't have done it after the Sasuke laeving, since there wouldn't be enough time to send someone to the wind country and for them to come back to the fire county and meet the genins while the genins were moving non-stop from the same time as the emmbassedor left.

the only reasonable guess is that it was Kakashi's or gai's (or iruka's) mission to call for them, but it still leaves the question of how tsunde knew to call them...